Lal, R. K. “Genetic Variability and Associations in Shankha Pushpi (Convolvulus Microphyllus Siebe Ex. Spreng)”. Journal of Spices and Aromatic Crops, vol. 12, no. 1, July 2003, pp. 67-71, https://updatepublishing.com/journal/index.php/josac/article/view/4752.