Freitas, M.F.H. de and Siqueira, J.O. (1994) “Mycelial growth of pre-germinated spores of the endomycorrhizal fungus Gigaspora gigantea in liquid medium supplemented with nitrogenous organic compounds”, Pesquisa Agropecuaria Brasileira, 29(5), pp. 751–756. doi:10.1590/S1678-3921.pab1994.v29.4111.