| TNT, a free program for phylogenetic analysis PA Goloboff, JS Farris, KC Nixon Cladistics 24 (5), 774-786, 2008 | 4748 | 2008 |
| The parsimony ratchet, a new method for rapid parsimony analysis KC Nixon Cladistics 15 (4), 407-414, 1999 | 1863 | 1999 |
| Angiosperm phylogeny inferred from 18S rDNA, rbcL, and atpB sequences DE Soltis, PS Soltis, MW Chase, ME Mort, DC Albach, M Zanis, ... Botanical Journal of the Linnean Society 133 (4), 381-461, 2000 | 1526 | 2000 |
| WinClada, version 1.00. 08 KC Nixon Published by the author, Ithaca, NY 734, 745, 2002 | 1497 | 2002 |
| An amplification of the phylogenetic species concept KC Nixon, QD Wheeler Cladistics 6 (3), 211-223, 1990 | 1137 | 1990 |
| tnt PA Goloboff, JS Farris, KC Nixon Cladistics-the International Journal of the Willi Hennig Society 20 (1), 84-84, 2004 | 1113 | 2004 |
| On outgroups KC Nixon, JM Carpenter Cladistics 9 (4), 413-426, 1993 | 1047 | 1993 |
| Populations, genetic variation, and the delimitation of phylogenetic species JI Davis, KC Nixon Systematic Biology 41 (4), 421-435, 1992 | 820 | 1992 |
| On simultaneous analysis KC Nixon, JM Carpenter Cladistics 12 (3), 221-241, 1996 | 687 | 1996 |
| WinClada KC Nixon Version 1 (08), 2002 | 653 | 2002 |
| Winclada (BETA) ver. 0.9. 9 KC Nixon Published by the author, Ithaca, NY, 1999 | 490 | 1999 |
| Archaefructaceae, a new basal angiosperm family G Sun, Q Ji, DL Dilcher, S Zheng, KC Nixon, X Wang Science 296 (5569), 899-904, 2002 | 479 | 2002 |
| Phylogeny, biogeography, and processes of molecular differentiation in Quercus subgenus Quercus (Fagaceae) PS Manos, JJ Doyle, KC Nixon Molecular phylogenetics and evolution 12 (3), 333-349, 1999 | 467 | 1999 |
| A reevaluation of seed plant phylogeny KC Nixon, WL Crepet, D Stevenson, EM Friis Annals of the Missouri Botanical Garden, 484-533, 1994 | 337 | 1994 |
| Infrageneric classification of Quercus (Fagaceae) and typification of sectional names KC Nixon Annales des sciences forestičres 50 (Supplement), 25s-34s, 1993 | 325 | 1993 |
| The genus Quercus in Mexico. KC Nixon Biological diversity of Mexico: origins and distribution., 447-458, 1993 | 277 | 1993 |
| Fossil evidence and phylogeny: the age of major angiosperm clades based on mesofossil and macrofossil evidence from Cretaceous deposits WL Crepet, KC Nixon, MA Gandolfo American Journal of Botany 91 (10), 1666-1682, 2004 | 254 | 2004 |
| TNT (Tree analysis using New Technology) ver. 1.1 P Goloboff, S Farris, K Nixon Tucumán, Argentina: Published by the authors, 2000 | 248 | 2000 |
| Polymorphic taxa, missing values and cladistic analysis KC Nixon, JI Davis Cladistics 7 (3), 233-241, 1991 | 246 | 1991 |
| Extinction and the origin of species KC Nixon, QD Wheeler Extinction and phylogeny, 119-143, 1992 | 206 | 1992 |
