Effects of slope and particle size on ant Locomotion: Implications for choice of substrat by antlions , Botz, Jason T.; Loudon, Catherine; Barger, J. Bradley, Olafsen, Jeffrey S.; Steeple, Don W.; (J. Kansas. Entomològi. Soc) , ISSN 0022-8567, 2003, vol. 76, NO3, pàg. 426-435 abstract