Freitas, R. M. O. de; Dombroski, J. L. D.; Freitas, F. C. L. de; Nogueira, N. W.; Procópio, I. J. S. Cowpea Production As Affected by Dry Spells in No-Tillage and Conventional Crop Systems. Semina: Ciênc. Agrár. 2013, 34, 3683-3690.