This map shows the geographic impact of Friesen'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 Friesen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Friesen more than expected).
This network shows the impact of papers produced by Friesen. 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 Friesen. The network helps show where Friesen may publish in the future.
Co-authorship network of co-authors of Friesen
This figure shows the co-authorship network connecting the top 25 collaborators of Friesen.
A scholar is included among the top collaborators of Friesen 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 Friesen. Friesen is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Delcore, Romano, et al.. (1994). The role of surgical treatment in Zollinger-Ellison syndrome.. PubMed. 26. 151–68.1 indexed citations
4.
Delcore, Romano & Friesen. (1994). The place for curative surgical procedures in the treatment of sporadic and familial Zollinger-Ellison syndrome.. PubMed. 69–76.6 indexed citations
5.
Friesen. (1993). Twice Neokoros: Ephesus, Asia and the Cult of the Flavian Imperial Family.30 indexed citations
6.
Friesen, et al.. (1991). A rapid gas chromatography-mass spectrometry method for the determination of urinary 3-methyladenine: application in human subjects.. PubMed. 102–6.3 indexed citations
7.
Friesen, et al.. (1983). Pancreatic polypeptide update: its roles in detection of the trait for multiple endocrine adenopathy syndrome, type I and pancreatic polypeptide-secreting tumors.. PubMed. 94(6). 1028–37.43 indexed citations
8.
Friesen, et al.. (1981). Zollinger-Ellison syndrome. Streptozotocin therapy for metastatic gastrinomas.. PubMed. 82(5). 216–21.3 indexed citations
9.
Tomita, Takashi, et al.. (1979). Stimulation of pancreatic islet hypertrophy and beta-cell hyperplasia in Syrian hamsters.. PubMed. 30. 310–1.3 indexed citations
10.
Friesen. (1976). Current dimensions of the endocrine system.. Advances in Surgery. 10. 23–59.2 indexed citations
11.
Friesen, et al.. (1976). Historical Essays on British Columbia.7 indexed citations
12.
Friesen, et al.. (1974). An experimental study of the antral gastrin mechanism.. PubMed. 75(4). 517–27.18 indexed citations
13.
Friesen. (1972). New concepts of the pathogenesis and treatment of non beta islet cell carcinoma of the pancreas.. PubMed. 31(1). 39–45.1 indexed citations
Friesen. (1957). The significance of the anomalous origin of the left hepatic artery from the left gastric artery in operations upon the stomach and esophagus.. PubMed. 23(12). 1103–8.30 indexed citations
16.
Williams, C B, et al.. (1957). The prevention of esophagitis after esophagogastrostomy in dogs by an interposed pedicled pylorus.. PubMed. 7. 348–52.1 indexed citations
17.
Friesen, et al.. (1956). The myenteric plexus of the pylorus: its early normal development and its changes in hypertrophic pyloric stenosis.. PubMed. 39(1). 21–9.39 indexed citations
18.
Friesen & Allan Hemingway. (1952). The vascular response of the stomach to experimental alterations in the autonomic nervous system of the dog.. PubMed. 18(2). 195–200.3 indexed citations
Friesen, et al.. (1951). The occurrence of massive generalized wound bleeding during operation. With reference to the possible role of blood transfusions in its etiology.. PubMed. 17(7). 609–22.11 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.