Martti Oka

836 total citations
48 papers, 627 citations indexed

About

Martti Oka is a scholar working on Rheumatology, Surgery and Radiology, Nuclear Medicine and Imaging. According to data from OpenAlex, Martti Oka has authored 48 papers receiving a total of 627 indexed citations (citations by other indexed papers that have themselves been cited), including 21 papers in Rheumatology, 18 papers in Surgery and 10 papers in Radiology, Nuclear Medicine and Imaging. Recurrent topics in Martti Oka's work include Rheumatoid Arthritis Research and Therapies (13 papers), Orthopedic Infections and Treatments (11 papers) and Musculoskeletal synovial abnormalities and treatments (5 papers). Martti Oka is often cited by papers focused on Rheumatoid Arthritis Research and Therapies (13 papers), Orthopedic Infections and Treatments (11 papers) and Musculoskeletal synovial abnormalities and treatments (5 papers). Martti Oka collaborates with scholars based in Finland, Italy and United States. Martti Oka's co-authors include Timo Möttönen, A. Rekonen, Pekka Hannonen, Mikko Hakola, Jyrki T. Kuikka, Matti Mäkelä, Ville Leppänen, Kai Sievers, A Eisalo and Hajime Inoue and has published in prestigious journals such as The Journal of Clinical Endocrinology & Metabolism, Medicine & Science in Sports & Exercise and European Journal of Endocrinology.

In The Last Decade

Martti Oka

45 papers receiving 541 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Martti Oka Finland	16	344	117	81	68	65	48	627
Rosa T. Canoso United States	13	363 1.1×	67 0.6×	187 2.3×	140 2.1×	41 0.6×	18	742
Richard M. van Vugt Netherlands	10	244 0.7×	93 0.8×	40 0.5×	69 1.0×	23 0.4×	18	468
Kazuhide Yamaoki Japan	10	189 0.5×	139 1.2×	71 0.9×	43 0.6×	35 0.5×	24	533
D Roig-Escofet Spain	18	359 1.0×	112 1.0×	48 0.6×	12 0.2×	75 1.2×	37	735
H K Nielsen Denmark	11	41 0.1×	100 0.9×	50 0.6×	30 0.4×	45 0.7×	22	408
Maria Stoenoiu Belgium	14	248 0.7×	124 1.1×	86 1.1×	45 0.7×	36 0.6×	57	676
Charles-Joël Menkès France	12	189 0.5×	123 1.1×	38 0.5×	18 0.3×	95 1.5×	41	824
L. Chen United States	13	269 0.8×	183 1.6×	112 1.4×	22 0.3×	70 1.1×	21	744
V. J. McCann Australia	17	89 0.3×	141 1.2×	53 0.7×	106 1.6×	87 1.3×	34	917
J. de Graeff Netherlands	16	33 0.1×	152 1.3×	29 0.4×	35 0.5×	39 0.6×	37	602

Countries citing papers authored by Martti Oka

Since Specialization

Citations

This map shows the geographic impact of Martti Oka'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 Martti Oka with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Martti Oka more than expected).

Fields of papers citing papers by Martti Oka

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Martti Oka. 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 Martti Oka. The network helps show where Martti Oka may publish in the future.

Co-authorship network of co-authors of Martti Oka

This figure shows the co-authorship network connecting the top 25 collaborators of Martti Oka. A scholar is included among the top collaborators of Martti Oka 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 Martti Oka. Martti Oka is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Hannonen, Pekka, Timo Möttönen, Mikko Hakola, & Martti Oka. (1993). Sulfasalazine in early rheumatoid arthritis. A 48‐week double‐blind, prospective, placebo‐controlled study. Arthritis & Rheumatism. 36(11). 1501–1509. 116 indexed citations

Möttönen, Timo, Pekka Hannonen, Martti Oka, et al.. (1988). Antibodies against native type ii collagen do not precede the clinical onset of rheumatoid arthritis. Arthritis & Rheumatism. 31(6). 776–779. 25 indexed citations

Oka, Martti, et al.. (1987). Technetium-99m in the Study of Rheumatic Joints. Scandinavian Journal of Rheumatology. 16(1). 271–279. 1 indexed citations

Oka, Martti, Timo Möttönen, & A. Rekonen. (1983). A Comparison of ^99m Tc-MDP and ^99m Tc-Pertechnetate by Computerized Quantitative Joint Scintigraphy. Scandinavian Journal of Rheumatology. 12(1). 46–48. 7 indexed citations

Sievers, Kai, et al.. (1980). Intra-Articular Osmic Acid in Rheumatoid Arthritis. Scandinavian Journal of Rheumatology. 9(1). 20–27. 1 indexed citations

Oka, Martti, et al.. (1976). Degenerative hip disease in adolescent athletes. Medicine & Science in Sports & Exercise. 8(2). 77???80–77???80. 5 indexed citations

Oka, Martti, et al.. (1975). Intra-Articular Triamcinolone Hexacetonide and Osmic Acid in Persistent Synovitis of the Knee. Scandinavian Journal of Rheumatology. 4(3). 125–128. 23 indexed citations

Oka, Martti, et al.. (1974). Polarographic Study of Serum Proteins in Rheumatic Diseases by the Brdicka Reaction. Scandinavian Journal of Rheumatology. 3(2). 79–80. 3 indexed citations

Rekonen, A., Jyrki T. Kuikka, & Martti Oka. (1974). Measurement of Joint Inflammation: Local^99mTc Indices of Knees, Hands, Elbows and Feet. Scandinavian Journal of Rheumatology. 3(2). 75–78. 5 indexed citations

10.

Oka, Martti, et al.. (1973). Measurement Of Systemic Inflammatory Activity In Rheumatoid Arthritis By The^99mTc Method. Scandinavian Journal of Rheumatology. 2(3). 101–107. 16 indexed citations

11.

Oka, Martti, et al.. (1969). The Fate and Distribution of Intra-Articularly Injected Osmium Tetroxide (Os-191). Acta Rheumatologica Scandinavica. 15(1-4). 35–42. 16 indexed citations

12.

Sievers, Kai, et al.. (1963). Intra-Articular Osmic Acid in Rheumatoid Arthritis. Acta Rheumatologica Scandinavica. 9(1-4). 20–27. 21 indexed citations

13.

Oka, Martti & Ville Leppänen. (1963). Metabolism of Tryptophan in Diabetes Mellitus. Acta Medica Scandinavica. 173(3). 361–364. 11 indexed citations

14.

Oka, Martti, et al.. (1962). The Oxygen Uptake of Red Cells in Anaemia. Acta Haematologica. 28(2). 119–123. 4 indexed citations

15.

Oka, Martti, et al.. (1961). Reiter's Syndrome Complicated by Universal Keratosis Blennorrhagica. Acta Rheumatologica Scandinavica. 7(1-4). 119–122. 1 indexed citations

16.

Oka, Martti & Ville Leppänen. (1960). Paper Chromatographic Studies on Urinary Indoles in Internal Diseases. Acta Medica Scandinavica. 166(4). 297–316. 2 indexed citations

17.

Oka, Martti. (1958). Activity of Rheumatoid Arthritis and Plasma 17-Hydroxycorticosteroids during Pregnancy and following Parturition: Report on Two Cases. Acta Rheumatologica Scandinavica. 4(1-4). 243–248. 17 indexed citations

18.

Oka, Martti, et al.. (1957). Effect of Hydrocortisone and Prednisone on the Excretion of Uropepsin in Rheumatic Subjects. Acta Rheumatologica Scandinavica. 3(1-4). 68–75. 1 indexed citations

19.

Oka, Martti. (1954). Some Observations on the Cholinesterase Activity of Plasma in Myocardial Infarction. Acta Medica Scandinavica. 150(4). 313–320. 3 indexed citations

20.

Oka, Martti. (1953). A Nicotinic Acid Ester (»Trafuril») Skin Test in Rheumatic Diseases.. Acta Medica Scandinavica. 145(4). 258–262. 8 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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