Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
Phylogeny and Subfamilial Classification of the Grasses (Poaceae)
2001601 citationsNigel P. Barker, H. Peter Linder et al.Annals of the Missouri Botanical Gardenprofile →
Peers — A (Enhanced Table)
Peers by citation overlap · career bar shows stage (early→late)
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Countries citing papers authored by Nigel P. Barker
Since
Specialization
Citations
This map shows the geographic impact of Nigel P. Barker'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 Nigel P. Barker with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Nigel P. Barker more than expected).
This network shows the impact of papers produced by Nigel P. Barker. 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 Nigel P. Barker. The network helps show where Nigel P. Barker may publish in the future.
Co-authorship network of co-authors of Nigel P. Barker
This figure shows the co-authorship network connecting the top 25 collaborators of Nigel P. Barker.
A scholar is included among the top collaborators of Nigel P. Barker 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 Nigel P. Barker. Nigel P. Barker is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Teske, Peter R., Sophie von der Heyden, Christopher D. McQuaid, & Nigel P. Barker. (2011). A review of marine phylogeography in southern Africa : review article. South African Journal of Science. 107. 1–11.10 indexed citations
10.
Linder, H. Peter, Carlos M. Baeza, Nigel P. Barker, et al.. (2009). A classification of the Danthonioideae (Poaceae). Annals of the Missouri Botanical Garden.3 indexed citations
11.
McKenzie, Robert J., et al.. (2008). Typification of the name Arctotis lanata and those of some southern African Haplocarpha species (Asteraceae, Arctotideae). Taxon. 57(2). 612–614.3 indexed citations
Barker, Nigel P., et al.. (2006). The flora of the Sneeuberg. 92(4). 202–205.1 indexed citations
14.
Robertson, Mark P. & Nigel P. Barker. (2006). A technique for evaluating species richness maps generated from collections data : research article. South African Journal of Science. 102. 77–84.18 indexed citations
15.
Villet, Martin H., et al.. (2004). Mechanisms generating biological diversity in the genus Platypleura Amyot & Serville, 1843 (Hemiptera: Cicadidae) in southern Africa : implications of a preliminary molecular phylogeny. South African Journal of Science. 100. 589–594.5 indexed citations
16.
Barker, Nigel P., et al.. (2004). A yellowwood by any other name : molecular systematics and the taxonomy of Podocarpus and the Podocarpaceae in southern Africa. South African Journal of Science. 100. 629–632.15 indexed citations
17.
Peter, Craig I., A. P. Dold, Nigel P. Barker, & Brad S. Ripley. (2004). Pollination biology of Bergeranthus multiceps (Aizoaceae) with preliminary observations of repeated flower opening and closure. South African Journal of Science. 100. 624–629.18 indexed citations
18.
Barker, Nigel P.. (1995). A systematic study of Pseudopentameris (Arundinoideae, Poaceae).. Bothalia. 25.3 indexed citations
19.
Barker, Nigel P.. (1986). The shape and ultrastructure of the caryopsis of Pentameris and Pseudopentameris species (Arundinoideae, Poaceae). Bothalia. 16.4 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.