S K Agrawal, R. L. B. “Effect of Irrigation and Crop Geometry on Growth, Yield, Quality and Profitability of Transplanted Fennel (Foeniculum Vulgare Mill.)”. Journal of Spices and Aromatic Crops, vol. 23, no. 1, June 2014, pp. 51-58, https://updatepublishing.com/journal/index.php/josac/article/view/5089.