Antonelli AC, Torres GAS, Mori CS, Soares PC, Maruta CA, Ortolani EL. Ammonia poisoning in cattle fed extruded or prilled urea: alterations in some chemistry components. Braz. J. Vet. Res. Anim. Sci. 2009;46(1):69-76. doi:10.11606/issn.1678-4456.bjvras.2009.26752