S. R. de F. Coelho, J. L. de M. Gonçalves, S. L. de M. Mello, R. M. Moreira, E. V. da Silva, and J.-P. Laclau, “Growth, nutrition and biological fixation of nitrogen in mixed-species plantations of eucalypt with leguminous trees”, PAB, vol. 42, no. 6, pp. 759–768, Jun. 2007.