Guerrero-Ortiz, Pilar Lourdes. “Respiration of CO2 As an Indicator of Microbial Activity in Organic Fertilizers of Lupinus”. REVISTA TERRA LATINOAMERICANA, vol. 30, no. 4, Nov. 2021, pp. 355-62, https://mail.terralatinoamericana.org.mx/index.php/terra/article/view/1091.