C. A. de Oliveira, I. E. Marriel, E. A. Gomes, U. G. de P. Lana, M. R. Scotti, and V. M. C. Alves, “Bacterial diversity in the rhizosphere of maize genotypes contrasting for phosphorus use efficiency”, PAB, vol. 44, no. 11, pp. 1473–1482, Dec. 2010.