Detection and differentiation of Leptospira spp. serovars in bovine semen by polymerase chain reaction and restriction fragment length polymorphism - Heinemann, Marcos Bryan; Garcia, José Fernando; Nunes, Cáris Maroni; Gregori, Fábio; Higa, Zenaide Maria de Morais; Vasconcellos, Silvio Arruda; Richtzenhain, Leonardo José (Veterinary Microbiology, 2000)