Bitencourt, Emanoelen Bitencourt e, et al. “Physical-Chemical Soil of Agroforestry System and Areas of Natural Regeneration in Southeastern Pará, Brazil”. Revista Verde De Agroecologia E Desenvolvimento Sustentável, vol. 15, no. 3, July 2020, pp. 239-44, doi:10.18378/rvads.v15i3.7468.