Raje, S. S. R. D. L. S. D. S. R. S. “Combining Ability in Fennel (Foeniculum Vulgare Mill.) for Yield and Quality”. Journal of Spices and Aromatic Crops, vol. 14, no. 1, June 2005, pp. 42-46, https://updatepublishing.com/journal/index.php/josac/article/view/4809.