Comparative efficacy of two single-dose bacterins in the control of Mycoplasma hyopneumoniae in swine raised under commercial conditions in Brazil - Baccaro, Maria Regina; Hirose, Flávio; Umehara, Ossamuro; Gonçalves, Lineu C. B; Doto, Daniela Sabatini; Paixão, Renata; Shinya, Luciane Tieko; Moreno, Andrea Micke (The Veterinary Journal, 2006)