B S Sreeramu, K N Srinivasappa, Bhuvaneshwari Bhuvaneshwari, A A Farooqi. “Influence of Nitrogen, Phosphorus and Potassium Levels on Growth, Seed Yield and Essential Oil Content in Anise (Pimpinella Anisum L.)”. Journal of Spices and Aromatic Crops 11, no. 2 (December 25, 2002): 112–117. Accessed May 3, 2024. https://updatepublishing.com/journal/index.php/josac/article/view/4723.