E. López-Rocha, A. I. Mireles-Arriga, J. Hernández-Ruíz, J. E. Ruiz-Nieto, and A. Rucoba-Garcia, “Potential areas for sunflower cultivation under rainfed conditions in Guanajuato, Mexico”, Agron. Mesoam., vol. 29, no. 2, pp. 305–314, May 2018.