Attributes / relations provided by
♦ 1Effectiveness of Dispersal of an Ornithocorous Cactus Myrtillocactus geometrizans (Cactaceae) in a Patchy Environment, Mónica G. Pérez-Villafaña and Alfonso Valiente-Banuet, The Open Biology Journal, 2009, 2, 101-113
♦ 2Spermophilus variegatus, Emily C. Oaks, Paul J. Young, Gordon L. Kirkland, Jr., and David F. Schmidt, MAMMALIAN SPECIES No. 272, pp. 1-8 (1987)