S. da S. Aquino and A. M. R. Cassiolato, “Contribution of arbuscular mycorrhizal fungi to the growth of Guazuma ulmifolia in degraded ’cerrado’ soil”, PAB, vol. 37, no. 12, pp. 1819–1823, Dec. 2002, doi: 10.1590/S1678-3921.pab2002.v37.6536.