| What to protect?—Systematics and the agony of choice RI Vane-Wright, CJ Humphries, PH Williams Biological conservation 55 (3), 235-254, 1991 | 2192 | 1991 |
| Beyond opportunism: key principles for systematic reserve selection RL Pressey, CJ Humphries, CR Margules, RI Vane-Wright, PH Williams Trends in ecology & evolution 8 (4), 124-128, 1993 | 1487 | 1993 |
| Would climate change drive species out of reserves? An assessment of existing reserve‐selection methods MB Araújo, M Cabeza, W Thuiller, L Hannah, PH Williams Global change biology 10 (9), 1618-1626, 2004 | 1019 | 2004 |
| Protected area needs in a changing climate L Hannah, G Midgley, S Andelman, M Araújo, G Hughes, ... Frontiers in Ecology and the Environment 5 (3), 131-138, 2007 | 1006 | 2007 |
| Bumblebee vulnerability and conservation world-wide PH Williams, JL Osborne Apidologie 40 (3), 367-387, 2009 | 780 | 2009 |
| Conservation conflicts across Africa A Balmford, JL Moore, T Brooks, N Burgess, LA Hansen, P Williams, ... Science 291 (5513), 2616-2619, 2001 | 777 | 2001 |
| A comparison of richness hotspots, rarity hotspots, and complementary areas for conserving diversity of British birds P Williams, D Gibbons, C Margules, A Rebelo, C Humphries, R Pressey Conservation biology 10 (1), 155-174, 1996 | 745 | 1996 |
| Biodiversity conservation planning tools: present status and challenges for the future S Sarkar, RL Pressey, DP Faith, CR Margules, T Fuller, DM Stoms, ... Annu. Rev. Environ. Resour. 31 (1), 123-159, 2006 | 685 | 2006 |
| A comparison of reserve selection algorithms using data on terrestrial vertebrates in Oregon B Csuti, S Polasky, PH Williams, RL Pressey, JD Camm, M Kershaw, ... Biological Conservation 80 (1), 83-97, 1997 | 625 | 1997 |
| Avoiding pitfalls of using species distribution models in conservation planning BA Loiselle, CA Howell, CH Graham, JM Goerck, T Brooks, KG Smith, ... Conservation biology 17 (6), 1591-1600, 2003 | 624 | 2003 |
| An annotated checklist of bumble bees with an analysis of patterns of description (Hymenoptera: Apidae, Bombini) PH Williams Bulletin-Natural History Museum Entomology Series 67, 79-152, 1998 | 614 | 1998 |
| Selecting areas for species persistence using occurrence data MB Araújo, PH Williams Biological conservation 96 (3), 331-345, 2000 | 589 | 2000 |
| Measuring more of biodiversity: can higher-taxon richness predict wholesale species richness? PH Williams, KJ Gaston Biological conservation 67 (3), 211-217, 1994 | 587 | 1994 |
| Representing biodiversity: data and procedures for identifying priority areas for conservation CR Margules, RL Pressey, PH Williams Journal of biosciences 27, 309-326, 2002 | 561 | 2002 |
| Measuring biodiversity value for conservation CJ Humphries, PH Williams, RI Vane-Wright Annual review of ecology and systematics, 93-111, 1995 | 473 | 1995 |
| A comprehensive phylogeny of the bumble bees (Bombus) SA Cameron, HM Hines, PH Williams Biological journal of the Linnean Society 91 (1), 161-188, 2007 | 456 | 2007 |
| Bumble bees of North America: an identification guide PH Williams, RW Thorp, LL Richardson, SR Colla Princeton University Press, 2014 | 450 | 2014 |
| Planning for climate change: identifying minimum‐dispersal corridors for the Cape Proteaceae P Williams, LEE Hannah, S Andelman, GUY Midgley, M AraúJo, ... Conservation Biology 19 (4), 1063-1074, 2005 | 422 | 2005 |
| Downscaling European species atlas distributions to a finer resolution: implications for conservation planning MB Araújo, W Thuiller, PH Williams, I Reginster Global Ecology and Biogeography 14 (1), 17-30, 2005 | 335 | 2005 |
| A simplified subgeneric classification of the bumblebees (genus Bombus) PH Williams, SA Cameron, HM Hines, B Cederberg, P Rasmont Apidologie 39 (1), 46-74, 2008 | 306 | 2008 |
