ATHITHAN, S; RAMANATHAN, N; RAMADHAS, V. Chemical speciation of nitrogen in integrated fish/pig farming system. Indian Journal of Fisheries, India, v. 54, n. 2, p. 171–178, 2011. Disponível em: https://epubs.icar.org.in/index.php/IJF/article/view/6918. Acesso em: 19 jun. 2026.