K N Srinivasappa, A Nataraja, A A Farooqi, B S Sreeramu,. “Influence of Nitrogen, Phosphours and Potassium on Growth and Yield of Black Cumin (Nigella Sativa L.)”. Journal of Spices and Aromatic Crops 12, no. 1 (June 25, 2003): 51–54. Accessed May 5, 2024. https://updatepublishing.com/journal/index.php/josac/article/view/4742.