This map shows the geographic impact of R Ammann'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 R Ammann with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites R Ammann more than expected).
This network shows the impact of papers produced by R Ammann. 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 R Ammann. The network helps show where R Ammann may publish in the future.
Co-authorship network of co-authors of R Ammann
This figure shows the co-authorship network connecting the top 25 collaborators of R Ammann.
A scholar is included among the top collaborators of R Ammann 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 R Ammann. R Ammann is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Zala, G, et al.. (1994). [Omeprazole/amoxicillin: improved eradication of Helicobacter pylori in smokers because of N-acetylcysteine].. PubMed. 124(31-32). 1391–7.21 indexed citations
3.
Altorfer, J, et al.. (1994). [Eosinophilia in primary biliary cirrhosis: regression under therapy with ursodeoxycholic acid].. PubMed. 124(19). 810–5.7 indexed citations
Münch, R, et al.. (1987). [Changes in the serum pancreas enzyme following i.v. stimulation with secretin in subjects with a normal pancreas].. PubMed. 117(20). 756–60.3 indexed citations
Heer, M, P Deyhle, R Münch, R Ammann, & H Bühler. (1984). [Results of electrocoagulation of angiodysplasia of the colon].. PubMed. 73(44). 1337–9.1 indexed citations
9.
Ammann, R, et al.. (1981). Quantitative assessment of duodenogastric reflux after vagotomy with or without pyloroplasty-A clinical investigation.. PubMed. 67. 55–7.3 indexed citations
10.
Ammann, R, W Häcki, M. Schmid, et al.. (1981). Announcement. Digestion. 21(6). 325–325.1 indexed citations
Hedinger, Chr., et al.. (1976). [Glucagon producing adenomatosis of Islands of Langerhans with polyendocrine symptoms].. Munich Personal RePEc Archive (Ludwig Maximilian University of Munich). 106(22). 749–54.6 indexed citations
16.
Ammann, R. (1976). [Vascular origin of chronic pancreatitis. Facts and hypotheses].. PubMed. 101(22). 867–8.1 indexed citations
17.
Ammann, R. (1976). [Diagnosis and differential diagnosis of pancreatitis--diagnostic relevance of clinical and biochemical changes during the course of the disease and of endoscopic retrograde pancreatography (author's transl)].. PubMed. 6(4). 217–26.3 indexed citations
18.
Ammann, R, et al.. (1974). [Diagnosis and therapy of chronic pancreatitis].. PubMed. 99(41). 2057–64.4 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.