O. F. Saraiva, M. M. Carvalho, and F. T. T. de Oliveira, “Nutriente limiting growth of molasses-grass in an oxisol”, PAB, vol. 28, no. 8, pp. 963–968, Aug. 1993, doi: 10.1590/S1678-3921.pab1993.v28.3959.