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.
The Families of the Monocotyledons. Structure, Evolution and Taxonomy
Citations per year, relative to Niels Jacobsen Niels Jacobsen (= 1×)
peers
Paolo Caputo
Countries citing papers authored by Niels Jacobsen
Since
Specialization
Citations
This map shows the geographic impact of Niels Jacobsen'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 Niels Jacobsen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Niels Jacobsen more than expected).
This network shows the impact of papers produced by Niels Jacobsen. 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 Niels Jacobsen. The network helps show where Niels Jacobsen may publish in the future.
Co-authorship network of co-authors of Niels Jacobsen
This figure shows the co-authorship network connecting the top 25 collaborators of Niels Jacobsen.
A scholar is included among the top collaborators of Niels Jacobsen 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 Niels Jacobsen. Niels Jacobsen is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Jacobsen, Niels, et al.. (2020). Cryptocoryne hybrids (Araceae) 3:Hybrids between Cryptocoryne cordata and Cryptocoryne nurii from southern Peninsular Malaysia. Research at the University of Copenhagen (University of Copenhagen).
4.
Ørgaard, Marian, et al.. (2020). Cryptocoryne hybrids (Araceae) 4:A Cryptocoryne hybrid from the Meratus mountains, South Kalimantan, Indonesia. Research at the University of Copenhagen (University of Copenhagen).
5.
Jacobsen, Niels, et al.. (2020). Cryptocoryne hybrids (Araceae) 2:Two Cryptocoryne (Araceae) hybrids from southern Peninsular Malaysia. Research at the University of Copenhagen (University of Copenhagen).
6.
Jacobsen, Niels & Marian Ørgaard. (2019). Artificial hybrids in Cryptocoryne (Araceae). 1. Hybridization between Sri Lankan species within the 2n = 28 chromosome group. Research at the University of Copenhagen (University of Copenhagen).
7.
Jacobsen, Niels, et al.. (2015). The use of AFLP markers to elucidate relationships within Cryptocoryne (Araceae). Research at the University of Copenhagen (University of Copenhagen).3 indexed citations
8.
Jacobsen, Niels. (1998). The high sands of the Danish Wadden sea-especially the ebb-tide delta, Søren Jessens Sande, and its incorporation with the Island of Fanø. Journal of Coastal Research. 14(1). 175–184.3 indexed citations
9.
Hay, Alistair, et al.. (1995). Checklist of the Araceae of Malesia, Australia, and the tropical western Pacific region. Data Archiving and Networked Services (DANS). 8(1). 1–161.9 indexed citations
10.
Bothmer, Roland von & Niels Jacobsen. (1980). A taxonomic revision of Hordeum secalinum and H. capense.. 74(4). 223–235.20 indexed citations
11.
Bothmer, Roland von, et al.. (1980). Revision of Hordeum sect. Anisolepis Nevski.. 133(4). 539–544.19 indexed citations
12.
Jacobsen, Niels. (1980). Does Cryptocoryne ferruginea flower at full moon. 3(4). 111–116.5 indexed citations
13.
Jacobsen, Niels. (1964). Træk af tøndermarskens naturgeografi : med særligt henblik på morfogenesen.2 indexed citations
14.
Jacobsen, Niels. (1960). Leo S. Berg: Die geographischen Zonen der Sowjetunion. Band 11. B. G. Teubner Verlagsgesellschaft, Leipzig 1959. 17 X23 cm. XIII 4- 606 sider, 26 pi., 4 kortbilag. DM 45,—.. Geografisk Tidsskrift-Danish Journal of Geography. 59.1 indexed citations
15.
Jacobsen, Niels. (1960). Types of sedimentation in a drowned delta region Examples from the salt-marsh area at Tønder. Geografisk Tidsskrift-Danish Journal of Geography. 59.1 indexed citations
16.
Jacobsen, Niels. (1960). Terence Armstrong: The Russians in the Arctic. Aspects of Soviet exploration and exploilation of the Far North 1937—57. Methuen and Co. Ltd., London 1958. 14x20 cm. 182 sider. 20 pi., 7 kort. Sh. 22/6.. Geografisk Tidsskrift-Danish Journal of Geography. 59.2 indexed citations
17.
Jacobsen, Niels. (1959). Geest-topografi under Tøndermarsken. Geestoverfladens morfologi i Møgeltønder Kog, beskrivelse og forsøgsvis tolkning.. Geografisk Tidsskrift-Danish Journal of Geography. 58.1 indexed citations
18.
Jacobsen, Niels. (1958). Leo S. Berg: Die geographischen Zonen der Sowjetunion. Band I. B. G. Teubner, Leipzig 1958. 17 X 23 cm. XVI + 485 sider. 105 illustrationer og 60 kort. DM 29,40.. Geografisk Tidsskrift-Danish Journal of Geography. 57.1 indexed citations
19.
Jacobsen, Niels. (1958). Hartmut Valentin: Glazialmorphologische Untersuchungen in Ostengland. Ein Beitrag zum Problem der letzten Vereisung im Nordseeraum. Abhandlungen des Geographischen Instituts der Freien Universität Berlin. Bd. 4. Herausg. von E. Fels und J. H. Schultze. Dietrich Reimer Verlag in Berlin 1957. 21 X 30 cm. 86 sider. 28 billeder, 2 10 kort. DM 20,-.. Geografisk Tidsskrift-Danish Journal of Geography. 57.1 indexed citations
20.
Jacobsen, Niels. (1957). Hugo Sjörs: Nordisk Växtgeografi. Scandinavian University Books. 1956. 17 X 23 cm, 229 sider, 108 fotografier og kort.. Geografisk Tidsskrift-Danish Journal of Geography. 56.6 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.