C. dos S. B. BONINI, M. C. ALVES, D. de C. MARCHINI, O. G. ARRUDA, and A. B. NETO, “PRODUCTION BRACHIARIA IN DEGRADED AREA RECOVERY USING SEWAGE SLUDGE AND MINERAL FERTILIZER”, Braz J Biosyst Eng, vol. 4, no. 3, pp. 166–174, Nov. 2010.