Goudra, Y. G. S. D. M. M. D. K. K. V. S. K. H. B. “Pollen Viability and Stigma Receptivity in Vanilla (Vanilla Planifolia Andrews)”. Journal of Spices and Aromatic Crops, vol. 12, no. 2, Dec. 2003, pp. 194-6, https://updatepublishing.com/journal/index.php/josac/article/view/4777.