Perniola, Michele, Irene Nardiello, and Stella Lovelli. “Effect of Sowing Date on Water Use Efficiency of Sunflower Crop”. Italian Journal of Agronomy 1, no. 3 (September 30, 2006): 387–392. Accessed November 24, 2024. https://www.agronomy.it/agro/article/view/ija.2006.387.