Hussain, S. et al. 2013. Profitability Assessment of Abscisic Acid Application on Sunflower (Helianthus annuus L.) Hybrid under Drought and Well Watered Conditions. Pakistan Journal of Nutrition. 12, 5 (Apr. 2013), 448–454. DOI:https://doi.org/10.3923/pjn.2013.448.454.