Barradas, Carlos Antonio Almeida, et al. “Behaviour of Temperate Green Manure Species in a Mountain Region of the Rio de Janeiro State, Brazil”. Pesquisa Agropecuaria Brasileira, vol. 36, no. 12, Dec. 2001, pp. 1461-8, https://doi.org/10.1590/S1678-3921.pab2001.v36.6280.