CHATURVEDI, O H; TIWARI, A D. A method for measuring ammonia in urea-treated straw stack. The Indian Journal of Animal Sciences, Delhi, India, v. 68, n. 5, 2012. Disponível em: https://epubs.icar.org.in/index.php/IJAnS/article/view/20823. Acesso em: 24 oct. 2025.