P. C. O. Trivelin, J. C. S. Rodrigues, and R. L. Victoria, “Utilization by early harvest sugar cane ratoon of the nitrogen from 15N-aqua ammonia and 15N-urea applied to the soil as vinasse N-complement”, PAB, vol. 31, no. 2, pp. 89–99, Feb. 1996, doi: 10.1590/S1678-3921.pab1996.v31.4457.