Klaus Hammer

971 total citations
18 papers, 815 citations indexed

About

Klaus Hammer is a scholar working on Physiology, Genetics and Cellular and Molecular Neuroscience. According to data from OpenAlex, Klaus Hammer has authored 18 papers receiving a total of 815 indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Physiology, 9 papers in Genetics and 7 papers in Cellular and Molecular Neuroscience. Recurrent topics in Klaus Hammer's work include Adenosine and Purinergic Signaling (8 papers), Genetics and Neurodevelopmental Disorders (6 papers) and Neurobiology and Insect Physiology Research (4 papers). Klaus Hammer is often cited by papers focused on Adenosine and Purinergic Signaling (8 papers), Genetics and Neurodevelopmental Disorders (6 papers) and Neurobiology and Insect Physiology Research (4 papers). Klaus Hammer collaborates with scholars based in Germany, United States and Hungary. Klaus Hammer's co-authors include Herbert Zimmermann, Simon C. Robson, Norbert Braun, Jean Sévigny, Keiichi Enjyoji, Jürgen Schrader, Patrycja Koszałka, David Langer, Francesco Di Virgilio and Olaf Guckelberger and has published in prestigious journals such as The Journal of Comparative Neurology, Brain Research and Neuroscience.

In The Last Decade

Klaus Hammer

16 papers receiving 805 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Klaus Hammer Germany 13 524 193 190 134 132 18 815
Siegfried W. Schoen Germany 17 267 0.5× 355 1.8× 86 0.5× 196 1.5× 62 0.5× 24 852
Lilla Otrokocsi Hungary 12 172 0.3× 121 0.6× 38 0.2× 324 2.4× 40 0.3× 13 829
Jiong Zhang Germany 10 131 0.3× 173 0.9× 48 0.3× 297 2.2× 43 0.3× 11 549
Steven J. Ennion United Kingdom 20 758 1.4× 160 0.8× 67 0.4× 719 5.4× 344 2.6× 31 1.4k
Charles Stout United States 11 176 0.3× 266 1.4× 97 0.5× 721 5.4× 170 1.3× 19 1.3k
Leif Järlebark Sweden 14 156 0.3× 69 0.4× 11 0.1× 230 1.7× 158 1.2× 23 645
Maira Monteiro Fróes Brazil 12 55 0.1× 166 0.9× 14 0.1× 246 1.8× 42 0.3× 22 495
Amelie K. Gubitz United States 12 429 0.8× 282 1.5× 64 0.3× 1.1k 8.3× 110 0.8× 13 1.5k
Timothy Othman United States 10 148 0.3× 143 0.7× 34 0.2× 133 1.0× 39 0.3× 18 459
Agustín Castañeyra-Perdomo Spain 17 30 0.1× 448 2.3× 64 0.3× 302 2.3× 83 0.6× 76 942

Countries citing papers authored by Klaus Hammer

Since Specialization
Citations

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

Fields of papers citing papers by Klaus Hammer

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Klaus Hammer

This figure shows the co-authorship network connecting the top 25 collaborators of Klaus Hammer. A scholar is included among the top collaborators of Klaus Hammer 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 Klaus Hammer. Klaus Hammer is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

18 of 18 papers shown
1.
Hammer, Klaus, Grigori Enikolopov, Keiichi Enjyoji, et al.. (2014). NTPDase2 and Purinergic Signaling Control Progenitor Cell Proliferation in Neurogenic Niches of the Adult Mouse Brain. Stem Cells. 33(1). 253–264. 41 indexed citations
2.
Hammer, Klaus, et al.. (2012). The medial habenula contains a specific nonstellate subtype of astrocyte expressing the ectonucleotidase NTPDase2. Glia. 60(12). 1860–1870. 14 indexed citations
3.
Langer, David, Klaus Hammer, Patrycja Koszałka, et al.. (2008). Distribution of ectonucleotidases in the rodent brain revisited. Cell and Tissue Research. 334(2). 199–217. 141 indexed citations
4.
Shukla, Varsha, Herbert Zimmermann, Liping Wang, et al.. (2005). Functional expression of the ecto‐ATPase NTPDase2 and of nucleotide receptors by neuronal progenitor cells in the adult murine hippocampus. Journal of Neuroscience Research. 80(5). 600–610. 78 indexed citations
5.
Braun, Norbert, Jean Sévigny, Santosh K. Mishra, et al.. (2003). Expression of the ecto‐ATPase NTPDase2 in the germinal zones of the developing and adult rat brain. European Journal of Neuroscience. 17(7). 1355–1364. 145 indexed citations
6.
Braun, Norbert, Jean Sévigny, Simon C. Robson, et al.. (2003). Association of the ecto‐ATPase NTPDase2 with glial cells of the peripheral nervous system. Glia. 45(2). 124–132. 92 indexed citations
7.
Braun, Norbert, Jean Sévigny, Simon C. Robson, et al.. (2000). Assignment of ecto‐nucleoside triphosphate diphosphohydrolase‐1/cd39 expression to microglia and vasculature of the brain. European Journal of Neuroscience. 12(12). 4357–4366. 139 indexed citations
8.
Braun, Norbert, Jean Sévigny, Simon C. Robson, et al.. (2000). Assignment of ecto-nucleoside triphosphate diphosphohydrolase-1/cd39 expression to microglia and vasculature of the brain. European Journal of Neuroscience. 12(12). 4357–4366. 31 indexed citations
9.
10.
Hammer, Klaus, et al.. (1993). Functional properties of mechanosensitive units from the chicken ureter in vitro. Pflügers Archiv - European Journal of Physiology. 425(3-4). 353–361. 12 indexed citations
11.
Seyfarth, Ernst‐August, et al.. (1993). Octopamine immunoreactive neurons in the fused central nervous system of spiders. Brain Research. 611(2). 197–206. 26 indexed citations
12.
13.
Hammer, Klaus & F Klingberg. (1991). Disturbance of brightness discrimination and active avoidance learning after lesions of nucleus reticularis tegmenti pontis (NRTP) of rats are related to impairment of goal-directed behaviour.. PubMed. 50(2). 169–74. 3 indexed citations
14.
Seyfarth, Ernst‐August, Werner Gnatzy, & Klaus Hammer. (1990). Coxal hair plates in spiders: physiology, fine structure, and specific central projections. Journal of Comparative Physiology A. 166(5). 8 indexed citations
15.
16.
Hammer, Klaus. (1987). Dramaturgische Schriften des 19. Jahrhunderts.
17.
Seyfarth, Ernst‐August, et al.. (1985). Proprioceptors and sensory nerves in the legs of a spider, Cupiennius salei (Arachnida, Araneida). Zoomorphology. 105(3). 190–196. 26 indexed citations
18.
Wolf, Friedrich, et al.. (1978). Cyankali : eine Dokumentation.

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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