This map shows the geographic impact of Jan Telgen'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 Jan Telgen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Jan Telgen more than expected).
This network shows the impact of papers produced by Jan Telgen. 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 Jan Telgen. The network helps show where Jan Telgen may publish in the future.
Co-authorship network of co-authors of Jan Telgen
This figure shows the co-authorship network connecting the top 25 collaborators of Jan Telgen.
A scholar is included among the top collaborators of Jan Telgen 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 Jan Telgen. Jan Telgen is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Telgen, Jan & Judith Timmer. (2016). Conditions for rank reversal in supplier selection. Data Archiving and Networked Services (DANS).1 indexed citations
5.
Telgen, Jan & Fredo Schotanus. (2010). Supplier selection requires full transparency. University of Twente Research Information.1 indexed citations
6.
Telgen, Jan, et al.. (2008). The splitting value: analyzing the value of buying in separate lots. University of Twente Research Information. 461–468.1 indexed citations
7.
Schotanus, Fredo, et al.. (2006). An analysis of some mistakes, miracles and myths in supplier selection.15 indexed citations
8.
Telgen, Jan. (2004). Purchasing control, compliance and the box: purchasing management based on hard data. University of Twente Research Information.2 indexed citations
9.
Schotanus, Fredo, et al.. (2004). Inkoopsamenwerking, van theorie naar praktijk. University of Twente Research Information.3 indexed citations
10.
Telgen, Jan. (2003). Inkoopdiagnose in soorten en maten. University of Twente Research Information. 19(10). 23–25.1 indexed citations
11.
Heijboer, Govert & Jan Telgen. (2002). Electronic purchasing: determining the optimal roll-out strategy. University of Twente Research Information.2 indexed citations
12.
Telgen, Jan, et al.. (1999). Inkoopmanagement in gemeenten. University of Twente Research Information.
13.
Telgen, Jan, et al.. (1998). Inkoopmanagement in de zorgsector : ...op weg naar professionalisering. University of Twente Research Information.2 indexed citations
Telgen, Jan, et al.. (1995). Aanbestedingen door gemeenten. Een onderzoek naar de naleving van de EG-richtlijnen. University of Twente Research Information. 16(20). 16–20.1 indexed citations
16.
Hoffman, Karla, et al.. (1987). Computation Mathematical Programming. CERN Document Server (European Organization for Nuclear Research).2 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.