Souza, C. A. S. (1991) “Development and nutrient levels of coffee seedlings inoculated with mycorrhizal fungi. Effect of organic matter and simple superphosphate”, Pesquisa Agropecuaria Brasileira, 26(11/12), pp. 1989–2005. doi: 10.1590/S1678-3921.pab1991.v26.3553.