Hoehne, L., Ribeiro, R., Carlesso, W. M., Ethur, E. M. e Stülp, S. (2013) “Physical and chemical characterization of earthworms and humus obtained by vertical vermicomposting”, Tecno-Lógica, 17(1), p. 60-65. doi: 10.17058/tecnolog.v17i1.3364.