This map shows the geographic impact of J. P. Willis'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 J. P. Willis with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites J. P. Willis more than expected).
This network shows the impact of papers produced by J. P. Willis. 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 J. P. Willis. The network helps show where J. P. Willis may publish in the future.
Co-authorship network of co-authors of J. P. Willis
This figure shows the co-authorship network connecting the top 25 collaborators of J. P. Willis.
A scholar is included among the top collaborators of J. P. Willis 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 J. P. Willis. J. P. Willis is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Spuy, D. van der & J. P. Willis. (1991). The occurrence of aragonite in carbonate lenses in coals from the Witbank area. South African Journal of Geology. 94. 178–180.1 indexed citations
Duncan, A. R., et al.. (1976). Source Region Constraints for Lunar Basalt Types Inferred from Trace Element Chemistry. Lunar and Planetary Science Conference. 7. 218.3 indexed citations
8.
Duncan, A. R., et al.. (1976). Some trace element constraints on lunar basalt genesis.. Lunar and Planetary Science Conference Proceedings. 2. 1659.18 indexed citations
Duncan, A. R., et al.. (1974). Trace Element Evidence for a Two Stage Origin of High-Titanium Mare Basalts. Lunar and Planetary Science Conference. 5. 187.3 indexed citations
14.
Duncan, A. R., et al.. (1974). Compositional Characteristics of the Apollo 17 Regolith. LPI. 5. 184.2 indexed citations
15.
Duncan, A. R., et al.. (1974). Trace element evidence for a two-stage origin of some titaniferous mare basalts.. Lunar and Planetary Science Conference Proceedings. 2. 1147–1157.30 indexed citations
Erlank, A. J., J. P. Willis, L.H. Ahrens, J. J. Gurney, & T.S. McCarthy. (1972). Inter-Element Relationships Between the Moon and Stony Meteorites with Particular Reference to Some Refractory Elements. LPI. 3. 239.4 indexed citations
18.
Willis, J. P., et al.. (1972). Major, minor, and trace element data for some Apollo 11, 12, 14 and 15 samples. Lunar and Planetary Science Conference Proceedings. 3. 1269.36 indexed citations
19.
Willis, J. P., L.H. Ahrens, R. V. Danchin, et al.. (1971). Some interelement relationships between lunar rocks and fines, and stony meteorites. 2. 1123.42 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.