Ríos-Plaza, J. L., Zúñiga-Valenzuela, R., Luna-Ortega, J. G., Perales-García, M. V., Gonzáles-Torres, A. and Mendoza-Retana, S. S. (2026) “Circular valorization of nopal (Opuntia spp.) waste through anaerobic digestion: biofertilizer quality, agronomic response and carbon footprint”, Journal of the Professional Association for Cactus Development, 28, pp. 93–108. doi: 10.56890/jpacd.v28i.619.