M. Oka

620 total citations
31 papers, 437 citations indexed

About

M. Oka is a scholar working on Rheumatology, Surgery and Physiology. According to data from OpenAlex, M. Oka has authored 31 papers receiving a total of 437 indexed citations (citations by other indexed papers that have themselves been cited), including 13 papers in Rheumatology, 6 papers in Surgery and 4 papers in Physiology. Recurrent topics in M. Oka's work include Rheumatoid Arthritis Research and Therapies (9 papers), Orthopedic Surgery and Rehabilitation (3 papers) and Systemic Lupus Erythematosus Research (3 papers). M. Oka is often cited by papers focused on Rheumatoid Arthritis Research and Therapies (9 papers), Orthopedic Surgery and Rehabilitation (3 papers) and Systemic Lupus Erythematosus Research (3 papers). M. Oka collaborates with scholars based in Finland, United States and Türkiye. M. Oka's co-authors include Pekka Hannonen, A. Rekonen, Timo Möttönen, K Vainio, Albert de la Chapelle, Jarmo Toivanen, Mikko Hakola, Ilmari Jokinen, H. Inoue and Kari Poikonen and has published in prestigious journals such as Cellular and Molecular Life Sciences, Annals of the Rheumatic Diseases and Scandinavian Journal of Clinical and Laboratory Investigation.

In The Last Decade

M. Oka

29 papers receiving 363 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
M. Oka Finland 12 244 111 71 55 55 31 437
Robert Irby United States 11 188 0.8× 36 0.3× 51 0.7× 21 0.4× 40 0.7× 20 346
Kenneth D. Muirden Australia 9 189 0.8× 62 0.6× 44 0.6× 14 0.3× 33 0.6× 16 350
B E Bourke United Kingdom 10 112 0.5× 79 0.7× 35 0.5× 13 0.2× 90 1.6× 19 362
Katherine Taylor United States 9 85 0.3× 236 2.1× 40 0.6× 10 0.2× 26 0.5× 15 548
Tomas Weitoft Sweden 11 212 0.9× 87 0.8× 49 0.7× 10 0.2× 25 0.5× 23 354
J. D. Rain France 10 58 0.2× 175 1.6× 302 4.3× 39 0.7× 35 0.6× 26 684
Berta Ungar Australia 13 81 0.3× 258 2.3× 37 0.5× 10 0.2× 26 0.5× 24 640
M A Hall United Kingdom 10 105 0.4× 68 0.6× 100 1.4× 18 0.3× 6 0.1× 18 352
J. Nerup Denmark 14 54 0.2× 211 1.9× 25 0.4× 24 0.4× 14 0.3× 28 623

Countries citing papers authored by M. Oka

Since Specialization
Citations

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

Fields of papers citing papers by M. Oka

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of M. Oka

This figure shows the co-authorship network connecting the top 25 collaborators of M. Oka. A scholar is included among the top collaborators of M. 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 M. Oka. M. Oka 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.
Türkmen, Zeynep, et al.. (2024). LC–MS/MS quantification of olanzapine in hair after alkaline digestion. Drug Testing and Analysis. 17(3). 412–419. 1 indexed citations
2.
Jokinen, Ilmari, Kari Poikonen, Timo Möttönen, et al.. (1990). Analysis of impaired in vitro immunoglobulin synthesis in rheumatoid arthritis.. Annals of the Rheumatic Diseases. 49(7). 507–511. 3 indexed citations
3.
Hannonen, Pekka, et al.. (1989). Clinical sequelae and sacroiliac joint changes by computed tomography after recovery from septic sacroiliitis. Clinical Rheumatology. 8(2). 197–201. 8 indexed citations
4.
Hannonen, Pekka, Mikko Hakola, Timo Möttönen, & M. Oka. (1989). Reactive Oligoarthritis Associated with Clostridium difficile Colitis. Scandinavian Journal of Rheumatology. 18(1). 57–60. 10 indexed citations
5.
Möttönen, Timo, et al.. (1988). Relation between Bone Erosions and Rheumatoid Factor IgA and IgM Isotypes in Recent Onset Rheumatoid Arthritis. Scandinavian Journal of Rheumatology. 17(sup75). 244–249. 14 indexed citations
6.
Möttönen, Timo, Pekka Hannonen, Jarmo Toivanen, A. Rekonen, & M. Oka. (1988). Value of joint scintigraphy in the prediction of erosiveness in early rheumatoid arthritis.. Annals of the Rheumatic Diseases. 47(3). 183–189. 39 indexed citations
7.
Möttönen, Timo, Pekka Hannonen, Jarmo Toivanen, A. Rekonen, & M. Oka. (1987). Scintigraphy of Rheumatoid Peripheral Joints: Reliability of Visual Assessment vs. Computerized Methods. Scandinavian Journal of Rheumatology. 16(6). 421–427. 6 indexed citations
8.
Hannonen, Pekka, et al.. (1987). Palindromic Rheumatism: A Clinical Survey of Sixty Patients. Scandinavian Journal of Rheumatology. 16(6). 413–420. 45 indexed citations
9.
Hannonen, Pekka, S Tikanoja, Mikko Hakola, et al.. (1986). Urinary Neopterin Index as a Measure of Rheumatoid Activity. Scandinavian Journal of Rheumatology. 15(2). 148–152. 20 indexed citations
10.
Hannonen, Pekka, Mikko Hakola, & M. Oka. (1985). Palindromic rheumatism in two non-identical brothers with identical HLA including DR4.. Annals of the Rheumatic Diseases. 44(3). 202–204. 4 indexed citations
11.
Möttönen, Timo, et al.. (1984). Glutathione and selenium in rheumatoid arthritis. Clinical Rheumatology. 3(2). 195–200. 18 indexed citations
12.
Oue, Hiroshi, et al.. (1965). [Clinical experiences with a new non-steroidal anti-inflammatory agent, "TAB" in orthopedics].. PubMed. 34(3). 800–11.
13.
Hopsu, Väinö K., Ville Leppänen, M. Oka, & T. Vanha‐Perttula. (1965). Urinary excretion of 5-hydroxyindole acetic acid by smokers and non-smokers. Cellular and Molecular Life Sciences. 21(12). 724–725. 2 indexed citations
14.
Oka, M. & Ville Leppänen. (1959). Urinary Indoles and other “Ehrlich's Reagent Reactors” in Rheumatoid Arthritis. Annals of the Rheumatic Diseases. 18(4). 313–317. 5 indexed citations
15.
Oka, M., et al.. (1958). Effect of Long-Term Treatment with Corticosteroids on Adrenocortical Function. Annals of the Rheumatic Diseases. 17(2). 184–188. 9 indexed citations
16.
Oka, M., et al.. (1958). Studies in the Response of Free and Conjugated Plasma 17-Hydroxycorticosteroids to Corticotrophin in Miscellaneous Clinical Disorders. Scandinavian Journal of Clinical and Laboratory Investigation. 10(3). 323–332. 2 indexed citations
17.
Oka, M., et al.. (1958). Determination of Conjugated 17-Hydroxycorticosteroids in Human Peripheral Blood. Scandinavian Journal of Clinical and Laboratory Investigation. 10(4). 359–363. 1 indexed citations
18.
Oka, M.. (1956). Absorption of Hydrocortisone from the Joint Cavity into the Circulation. Annals of the Rheumatic Diseases. 15(4). 327–329. 17 indexed citations
19.
Vainio, K & M. Oka. (1953). Ulnar Deviation of the Fingers. Annals of the Rheumatic Diseases. 12(2). 122–124. 29 indexed citations
20.
Oka, M.. (1953). Effect of Pregnancy on the Onset and Course of Rheumatoid Arthritis. Annals of the Rheumatic Diseases. 12(3). 227–229. 71 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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