This map shows the geographic impact of J. A. HARDMAN'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. A. HARDMAN with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites J. A. HARDMAN more than expected).
This network shows the impact of papers produced by J. A. HARDMAN. 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. A. HARDMAN. The network helps show where J. A. HARDMAN may publish in the future.
Co-authorship network of co-authors of J. A. HARDMAN
This figure shows the co-authorship network connecting the top 25 collaborators of J. A. HARDMAN.
A scholar is included among the top collaborators of J. A. HARDMAN 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. A. HARDMAN. J. A. HARDMAN is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Ellis, P. R., et al.. (1997). Evaluation of carrot varieties and seed company lines for resistance to carrot fly (Psila rosae (Fab.))at Wellesbourne 1991-96. 30–31.1 indexed citations
Ellis, P. R., et al.. (1992). Host plants of the carrot fly, Psila rosae (F.) (Dipt., Psilidae).. The Entomologist s monthly magazine. 128. 1–9.8 indexed citations
10.
Ellis, P. R., et al.. (1990). Wild umbelliferous species as sources of resistance to carrot fly.. 1. 199–206.1 indexed citations
11.
Cole, R. A., et al.. (1990). The incidence of seed-borne bacteria in carrots and their association with damage caused by the larvae of the carrot fly (Psila rosae).. 1. 343–347.3 indexed citations
12.
HARDMAN, J. A., et al.. (1985). Bibliography of the carrot fly Psila rosae (F.)..1 indexed citations
13.
Wheatley, G. A., et al.. (1984). Effects of metalaxyl and carbofuran in a fluid-drilling gel on cavity spot incidence and the yield of carrots. Annals of Applied Biology. 104. 38–39.8 indexed citations
14.
Ellis, P. R., et al.. (1982). Screening of carrot cultivars for their susceptibility to carrot fly, 1976-1980. Annals of Applied Biology. 100. 96–97.3 indexed citations
15.
Ellis, P. R., et al.. (1982). Screening of Japanese carrot cultivars for their susceptibility to carrot fly. Annals of Applied Biology. 100(3). 94–95.4 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.