E. R. da Silva, S. M. de Faria, E. F. C. Campello, and M. A. M. de Asconegui, “Nurseries for tree legumes containing up to 80% rock phosphate - Preliminary results”, PAB, vol. 19, no. 13, pp. 283–291, Apr. 2014, doi: 10.1590/S1678-3921.pab1984.v19.17579.