L. A. Crisóstomo, O. S. Castor, C. M. Cordeiro, and T. G. Campos, “Effect of increasing levels of nitrogen on profitability and risk of commercial production of three potato cultivars”, PAB, vol. 18, no. 7, pp. 735–740, Apr. 2014, doi: 10.1590/S1678-3921.pab1983.v18.18075.