Margaretha Viljoen

2.3k total citations · 1 hit paper
67 papers, 1.7k citations indexed

About

Margaretha Viljoen is a scholar working on Psychiatry and Mental health, Cardiology and Cardiovascular Medicine and Physiology. According to data from OpenAlex, Margaretha Viljoen has authored 67 papers receiving a total of 1.7k indexed citations (citations by other indexed papers that have themselves been cited), including 16 papers in Psychiatry and Mental health, 11 papers in Cardiology and Cardiovascular Medicine and 9 papers in Physiology. Recurrent topics in Margaretha Viljoen's work include Heart Rate Variability and Autonomic Control (10 papers), Stress Responses and Cortisol (5 papers) and Attention Deficit Hyperactivity Disorder (5 papers). Margaretha Viljoen is often cited by papers focused on Heart Rate Variability and Autonomic Control (10 papers), Stress Responses and Cortisol (5 papers) and Attention Deficit Hyperactivity Disorder (5 papers). Margaretha Viljoen collaborates with scholars based in South Africa, Canada and United Kingdom. Margaretha Viljoen's co-authors include PF Levay, Annîe Panzer, N. Claassen, Catharina C. Grant, Piet Becker, Dina C. Janse van Rensburg, Robert Maunder, S. W. Human, Jonathan Hunter and Paola Wood and has published in prestigious journals such as SHILAP Revista de lepidopterología, Social Science & Medicine and Life Sciences.

In The Last Decade

Margaretha Viljoen

66 papers receiving 1.6k citations

Hit Papers

Lactoferrin: a general review. 1995 2026 2005 2015 1995 100 200 300 400 500
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Lactoferrin: a general review.
    1995 545 citations Margaretha Viljoen et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Margaretha Viljoen South Africa 18 474 256 252 173 165 67 1.7k
Diantha B. Howard United States 26 168 0.4× 233 0.9× 151 0.6× 189 1.1× 69 0.4× 58 2.1k
John N. Udall United States 30 538 1.1× 222 0.9× 104 0.4× 424 2.5× 208 1.3× 100 2.6k
Satinder Aneja India 28 453 1.0× 148 0.6× 72 0.3× 131 0.8× 727 4.4× 179 2.5k
Vincenzo De Leo Italy 41 185 0.4× 862 3.4× 257 1.0× 302 1.7× 162 1.0× 213 5.6k
Michał Michalak Poland 25 111 0.2× 500 2.0× 293 1.2× 312 1.8× 335 2.0× 233 2.6k
Shannon C. Miller United States 26 238 0.5× 702 2.7× 209 0.8× 94 0.5× 66 0.4× 52 2.9k
Helena Kaminami Morimoto Brazil 25 131 0.3× 444 1.7× 97 0.4× 117 0.7× 387 2.3× 66 2.8k
Edna Maria Vissoci Reiche Brazil 31 260 0.5× 761 3.0× 138 0.5× 132 0.8× 404 2.4× 154 4.3k
Sarika Arora India 20 223 0.5× 245 1.0× 97 0.4× 145 0.8× 44 0.3× 69 1.9k
Amene Saghazadeh Iran 35 222 0.5× 719 2.8× 110 0.4× 187 1.1× 283 1.7× 112 3.6k

Countries citing papers authored by Margaretha Viljoen

Since Specialization
Citations

This map shows the geographic impact of Margaretha Viljoen's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Margaretha Viljoen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Margaretha Viljoen more than expected).

Fields of papers citing papers by Margaretha Viljoen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Margaretha Viljoen. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Margaretha Viljoen. The network helps show where Margaretha Viljoen may publish in the future.

Co-authorship network of co-authors of Margaretha Viljoen

This figure shows the co-authorship network connecting the top 25 collaborators of Margaretha Viljoen. A scholar is included among the top collaborators of Margaretha Viljoen based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Margaretha Viljoen. Margaretha Viljoen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Viljoen, Margaretha & Johannes L. Roos. (2020). Physical exercise and the patient with schizophrenia. Australian Journal of General Practice. 49(12). 803–808. 5 indexed citations
2.
Viljoen, Margaretha, et al.. (2019). Heart Rate Variability and Academic Performance of First-Year University Students. Neuropsychobiology. 78(4). 175–181. 7 indexed citations
3.
Viljoen, Margaretha & N. Claassen. (2017). Allostatic load and heart rate variability as health risk indicators. African Health Sciences. 17(2). 428–428. 22 indexed citations
4.
Viljoen, Margaretha, et al.. (2014). Antidepressants may lead to a decrease in niacin and NAD in patients with poor dietary intake. Medical Hypotheses. 84(3). 178–182. 6 indexed citations
5.
Grant, Catharina C., et al.. (2012). Overweight and obesity in children and adolescents : the South African problem : review article. South African Journal of Science. 108. 1–7. 6 indexed citations
6.
Viljoen, Margaretha, et al.. (2011). Stimulants and growth in children with attention-deficit/hyperactivity disorder. Medical Hypotheses. 77(1). 21–28. 12 indexed citations
7.
Rensburg, Dina C. Janse van, et al.. (2010). Efficacy of an exercise programme on the functional capacity and disease activity in females with rheumatoid arthritis. The South African Orthopaedic Journal (SAOJ). 9(2). 34–43. 7 indexed citations
8.
Grant, Catharina C., et al.. (2009). Relationship between exercise capacity and heart rate variability: Supine and in response to an orthostatic stressor. Autonomic Neuroscience. 151(2). 186–188. 22 indexed citations
9.
Viljoen, Margaretha, et al.. (2008). A Comparison of Quality of Life in Haemodialysis and Peritoneal Dialysis Patients. Journal of Psychology in Africa. 18(4). 625–630. 3 indexed citations
10.
Viljoen, Margaretha, et al.. (2007). Ferritin and ferritin isoforms I: Structure–function relationships, synthesis, degradation and secretion. Archives of Physiology and Biochemistry. 113(1). 30–54. 135 indexed citations
11.
Panzer, Annîe, Margaretha Viljoen, & Johannes L. Roos. (2007). The neurobiological basis of fear: a concise review. UpSpace Institutional Repository (University of Pretoria). 10(2). 71–75. 2 indexed citations
12.
Viljoen, Margaretha, et al.. (2006). Neurological aspects of stuttering : summary overview of scientific findings : overview. Health SA Gesondheid. 11(1). 58–66. 1 indexed citations
13.
Panzer, Annîe & Margaretha Viljoen. (2004). Dissociation: a developmental psychoneurobiological perspective: review article. African Journal of Psychiatry. 7(3). 11–6. 2 indexed citations
14.
Panzer, Annîe & Margaretha Viljoen. (2004). Supportive neurodevelopmental evidence for ADHD as a developmental disorder. Medical Hypotheses. 64(4). 755–758. 11 indexed citations
15.
Panzer, Annîe, Margaretha Viljoen, Robert Maunder, & Jonathan Hunter. (2003). The difficult patient: An attachment perspective. SHILAP Revista de lepidopterología. 45(8). 3–3. 3 indexed citations
16.
Viljoen, Margaretha. (2003). Sickness behaviour: Causes and effects. SHILAP Revista de lepidopterología. 45(9). 4–4. 5 indexed citations
17.
Viljoen, Margaretha, et al.. (2003). Psychoneuroimmunology: from philosophy, intuition, and folklore to a recognized science. South African Journal of Science. 99. 332–336. 1 indexed citations
18.
Kruger, Marlena C., et al.. (2002). Intracellular free calcium in the neutrophils of maintenance haemodialysis patients. Clinical Physiology and Functional Imaging. 22(4). 285–294. 5 indexed citations
19.
Viljoen, Margaretha, et al.. (1991). Physical Properties of the Red Blood Cells in Chronic Renal Failure. ˜The œNephron journals/Nephron journals. 59(2). 271–278. 16 indexed citations
20.
Viljoen, Margaretha, et al.. (1979). Site of renal action of xipamide. Clinical Pharmacology & Therapeutics. 25(5part1). 522–528. 5 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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