Nichal, S. S., et al. “Correlation of Seed and Seedling Characters With Yield of Sunflower (Helianthus Annuus L.) Hybrids”. International Journal of Economic Plants, vol. 2, no. Feb, 1, Feb. 2015, pp. 001-4, https://ojs.pphouse.org/index.php/IJEP/article/view/4397.