Locatelli, L. M., Vitovski, C. A. and Lovato, P. E. (2002) “Root architecture of apple rootstocks inoculated with arbuscular mycorrhizal fungi”, Pesquisa Agropecuaria Brasileira, 37(9), pp. 1239–1245. doi: 10.1590/S1678-3921.pab2002.v37.6462.