This map shows the geographic impact of Spiegel Am'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 Spiegel Am with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Spiegel Am more than expected).
This network shows the impact of papers produced by Spiegel Am. 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 Spiegel Am. The network helps show where Spiegel Am may publish in the future.
Co-authorship network of co-authors of Spiegel Am
This figure shows the co-authorship network connecting the top 25 collaborators of Spiegel Am.
A scholar is included among the top collaborators of Spiegel Am 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 Spiegel Am. Spiegel Am is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Am, Spiegel. (1999). Hormone resistance caused by mutations in G proteins and G protein-coupled receptors.. PubMed. 12 Suppl 1. 303–9.7 indexed citations
Pines, Mark, et al.. (1986). The inhibitory guanine nucleotide regulatory protein modulates agonist-stimulated cAMP production in rat osteosarcoma cells.. PubMed. 1(1). 15–26.32 indexed citations
Am, Spiegel & Michael A. Levine. (1982). Pseudohypoparathyroidism: deficiency of hormone receptor-adenylate cyclase coupling protein as a cause of hereditary hormone resistance.. PubMed. 97. 327–40.1 indexed citations
15.
Marx, Stephen J., Spiegel Am, Edward M. Brown, et al.. (1980). Urinary cyclic 3',5'-adenosine monophosphate (cAMP): an index of the action of parathyroid hormone on the kidney.. PubMed. 17. 182–9.5 indexed citations
Am, Spiegel, et al.. (1979). Separation of a guanine nucleotide regulatory unit from the adenylate cyclase complex with GTP affinity chromatography.. PubMed. 5(1). 3–17.15 indexed citations
18.
Brennan, Murray F., et al.. (1978). Reoperative parathyroid surgery for persistent hyperparathyroidism.. Munich Personal RePEc Archive (Ludwig Maximilian University of Munich). 83(6). 669–76.61 indexed citations
Am, Spiegel, et al.. (1976). Holocatalytic state of adenylate cyclase in turkey erythrocyte membranes: formation with guanylylimidodiphosphate plus isoproterenol without effect on affinity of beta-receptor.. PubMed. 2(1). 47–56.8 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.