“Economic Heterosis in Sunflower Helianthus Annuus L.: Seed Yield and Yield Attributing Traits in Newly Developed Hybrids”. Electronic Journal of Plant Breeding 11, no. 02 July 15, 2020: 461-468. Accessed May 2, 2024. https://www.ejplantbreeding.org/index.php/EJPB/article/view/3279.