Sampaio, C. A. de P., Nääs, I. de A., & Salgado, D. D. (2006). Ammonia, hydrogen sulfide, methane and carbon monoxide in swine production. Revista De Ciências Agroveterinárias, 5(2), 156–164. Retrieved from https://revistas.udesc.br/index.php/agroveterinaria/article/view/5391