Hi all I've been trying to find a couple of articles by Ann Forsten (and/or a current contact): FORSTEN, A. (1989), HORSE DIVERSITY THROUGH THE AGES. Biological Reviews, 64: 279–304. doi: 10.1111/j.1469-185X.1989.tb00677.x ORSTEN, A., Size decrease in Late Pleistocene-Holocene caballoid horses (genus Equus), intra- or interspecific evolution? A discussion of alternatives, Quaternary International, Volume 19, 1993, Pages 71-75. regards Pamela J Cross Zoo/Bioarchaeology Arch Sci, University of Bradford UK