Oliveira Filho, José de Souza, et al. “Phosphorus Forms and Lability of Organic Matter During Anaerobic Digestion of Swine Manure”. Semina: Ciências Agrárias, vol. 40, no. 5Supl1, Aug. 2019, pp. 2107-20, doi:10.5433/1679-0359.2019v40n5Supl1p2107.