This map shows the geographic impact of W.J. Willems'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 W.J. Willems with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites W.J. Willems more than expected).
This network shows the impact of papers produced by W.J. Willems. 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 W.J. Willems. The network helps show where W.J. Willems may publish in the future.
Co-authorship network of co-authors of W.J. Willems
This figure shows the co-authorship network connecting the top 25 collaborators of W.J. Willems.
A scholar is included among the top collaborators of W.J. Willems 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 W.J. Willems. W.J. Willems is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Willems, W.J., Arthur Beusen, H.H. Luesink, et al.. (2005). Nutrientenbelasting van bodem en water: verkenning van de gevolgen van het nieuwe mestbeleid. Socio-Environmental Systems Modeling.1 indexed citations
6.
Schröder, J.J., H.F.M. Aarts, J.C. van Middelkoop, et al.. (2005). Limits to the use of manure and mineral fertilizer in grass and silage maize production in The Netherlands with special reference to the EU nitrates directive. Socio-Environmental Systems Modeling.15 indexed citations
7.
Velthof, G.L., C.L. Beek, S.L.G.E. Burgers, et al.. (2004). Denitrificatie in de zone tussen bouwvoor en het bovenste grondwater in zandgronden. Socio-Environmental Systems Modeling.2 indexed citations
8.
Willems, W.J., B. Fraters, C. R. Meinardi, et al.. (2003). Nutrienten in bodem en grondwater:Kwaliteitsdoelstellingen en kwaliteit 1984-2000. Socio-Environmental Systems Modeling.2 indexed citations
9.
Willems, W.J., Th.V. Vellinga, O. Oenema, et al.. (2000). Onderbouwing van het Nederlandse derogatieverzoek in het kader van de Europese nitraatrichtlijn. Socio-Environmental Systems Modeling.5 indexed citations
Oenema, O., P. C. M. Boers, M.M. van Eerdt, et al.. (1997). The nitrate problem and nitrate policy in the Netherlands. Socio-Environmental Systems Modeling.7 indexed citations
12.
Driel, W. van, et al.. (1995). Resultaten van een onderzoek naar de mogelijke opzet van een Landelijk Meetnet Bodemkwaliteit. Data Archiving and Networked Services (DANS).3 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.