This map shows the geographic impact of S Koga'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 S Koga with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites S Koga more than expected).
This network shows the impact of papers produced by S Koga. 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 S Koga. The network helps show where S Koga may publish in the future.
Co-authorship network of co-authors of S Koga
This figure shows the co-authorship network connecting the top 25 collaborators of S Koga.
A scholar is included among the top collaborators of S Koga 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 S Koga. S Koga 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.
Takamasu, Kiyoshi, et al.. (2004). Evaluation of Uncertainty by Form Deviations of Measured Workpieces in Specified Measuring Strategies.5 indexed citations
IITSUKA, Yasuo, Seiji Shiota, Takahiro Matsui, et al.. (1990). Relationship between the cytologic characteristics of intraperitoneal free cancer cells and the prognosis in patients with gastric cancer.. PubMed. 34(3). 437–42.39 indexed citations
Koga, S, Hideaki Nishidoi, Nobuaki Kaibara, et al.. (1984). Follow-up study on the cause of death after surgery for gastric and duodenal ulcers with special reference to the incidence of residual stomach cancer.. PubMed. 109(12). 791–6.1 indexed citations
13.
Sasaki, F, S Koga, Ario Takeuchi, et al.. (1984). [A case of rectal leiomyosarcoma].. PubMed. 29(7). 825–7.6 indexed citations
14.
Kimura, Osamu, et al.. (1984). [A histopathological study of gastric cancer with liver metastasis, with special reference to poorly differentiated adenocarcinoma of the medullary type].. PubMed. 30(2). 131–7.5 indexed citations
15.
Kaibara, Nobuaki, et al.. (1982). Advanced gastric cancer simulating early cancer in gross morphologic features.. PubMed. 107(19). 1222–7.2 indexed citations
16.
Maeta, Michio, et al.. (1981). [Continuous hyperthermic peritoneal perfusion for peritoneal dissemination of gastric cancer (author's transl)].. PubMed. 16(7). 1346–50.2 indexed citations
17.
Kudo, Hiromi, et al.. (1978). An application of scanning electron microscopy to cytodiagnosis of pleural and peritoneal fluids. Comparative observation of the same cells by light microscopy and scanning electron microscopy.. Munich Personal RePEc Archive (Ludwig Maximilian University of Munich). 22(6). 490–9.10 indexed citations
Koga, S. (1976). [Total gastrectomy in patients over 70 years old. Postoperative complications and prognosis].. PubMed. 47(9). 490–3.1 indexed citations
20.
Koga, S, et al.. (1969). [Reoperation of recurrent stomach carcinoma].. PubMed. 40(7). 325–9.3 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.