Ieremenko, O., S. Kalensky, and V. Kalytka. 2017. “Sunflower (Helianthus Annuus L.) Productivity under the Effect of Akm Plant Growth Regulator in the Conditions of the Southern Steppe of Ukraine”. Agricultural Science and Practice 4 (1), 11-19. https://doi.org/10.15407/agrisp4.01.011.