| Klíč ke květeně České republiky K Kubát, L Hrouda, J Chrtek jun., Z Kaplan, J Kirschner, J Štěpánek Academia, Praha, 2002 | 895* | 2002 |
| TRY plant trait database–enhanced coverage and open access J Kattge, G Bönisch, S Díaz, S Lavorel, IC Prentice, P Leadley, ... Global change biology 26 (1), 119-188, 2020 | 574 | 2020 |
| Checklist of vascular plants of the Czech Republic. J Danihelka, J Chrtek Jr, Z Kaplan Preslia 84 (3), 647-811, 2012 | 415 | 2012 |
| Catalogue of alien plants of the Czech Republic: checklist update, taxonomic diversity and invasion patterns P Pyšek, J Danihelka, J Sádlo, J Chrtek Jr, M Chytrý, V Jarošík, Z Kaplan, ... Preslia 84 (2), 155-255, 2012 | 402 | 2012 |
| An account of the species of Potamogeton L. (Potamogetonaceae) G Wieglet, Z Kaplan Folia Geobotanica 33 (3), 241-316, 1998 | 206 | 1998 |
| Key to the flora of the Czech Republic K Kubát, L Hrouda, J Chrtek, Z Kaplan, J Kirschner, J Štěpánek Academia, Praha, 2002 | 157 | 2002 |
| Phenotypic plasticity in Potamogeton (Potamogetonaceae) Z Kaplan Folia Geobotanica 37 (2), 141-170, 2002 | 118 | 2002 |
| A taxonomic revision of Stuckenia (Potamogetonaceae) in Asia, with notes on the diversity and variation of the genus on a worldwide scale Z Kaplan Folia Geobotanica 43 (2), 159-234, 2008 | 114 | 2008 |
| Flora and phytogeography of the Czech Republic Z Kaplan Flora and Vegetation of the Czech Republic, 89-163, 2017 | 92 | 2017 |
| Flora and phytogeography of the Czech Republic Z Kaplan Preslia 84, 505-573, 2012 | 92* | 2012 |
| Molecular evidence for a natural primary triple hybrid in plants revealed from direct sequencing Z Kaplan, J Fehrer Annals of Botany 99 (6), 1213-1222, 2007 | 61 | 2007 |
| Klíč ke květeně České republiky [Key to the flora of the Czech Republic], ed. 2 Z Kaplan, J Danihelka, J Chrtek, J Kirschner, K Kubát, M Štech, ... Academia, Praha: Czech Republic, 2019 | 59* | 2019 |
| Evidence for the hybrid origin of Potamogeton ×cooperi (Potamogetonaceae): Traditional morphology-based taxonomy and molecular techniques in concert Z Kaplan, J Fehrer Folia Geobotanica 39 (4), 431-453, 2004 | 52 | 2004 |
| Plant distribution data for the Czech Republic integrated in the Pladias database J Wild, Z Kaplan, J Danihelka, P Petřík, M Chytrý, P Novotný, M Rohn, ... Preslia 91 (1), 1-24, 2019 | 51 | 2019 |
| Revision of chromosome numbers of Potamogetonaceae: a new basis for taxonomic and evolutionary implications. Z Kaplan, V Jarolimova, J Fehrer Preslia 85 (4), 421-482, 2013 | 51 | 2013 |
| Catalogue of alien plants of the Czech Republic: checklist update, taxonomic diversity and invasion patterns P Pysek, J Danihelka, J Sadlo, J Chrtek Jr, M Chytry, V Jarosik, Z Kaplan, ... Preslia 84 (2), 155-255, 2012 | 50 | 2012 |
| Genetic variation within and between populations of Potamogeton pusillus agg. Z Kaplan, J Štěpánek Plant Systematics and Evolution 239 (1), 95-112, 2003 | 47 | 2003 |
| Comparison of natural and artificial hybridization in Potamogeton Z Kaplan Preslia 78, 303-316, 2006 | 46 | 2006 |
| Hybridization of Potamogeton species in the Czech Republic: diversity, distribution, temporal trends and habitat preferences. Z Kaplan Preslia 82 (3), 261-287, 2010 | 44 | 2010 |
| New hybrid combinations revealed by molecular analysis: The unknown side of North American pondweed diversity (Potamogeton) Z Kaplan, J Fehrer, C Hellquist Systematic Botany 34 (4), 625-642, 2009 | 44 | 2009 |
