Widespread occurrence of the American Bullfrog, Lithobates catesbeianus (Shaw, 1802) (Anura: Ranidae), in Brazil - Both, Camila; Lingnau, Rodrigo; Santos-Jr., Alfredo; Madalozzo, Bruno; Lima, Leoncio Pedrosa; Grant, Taran (South American Journal of Herpetology, 2011)