Krishna Kumar, S N Potty, Y. S. R. K. M. M. K. J. M. M. R. S. V. “Natural Fruit Set in Vanilla Wightiana Lindl., an Endangered Species from Andhra Pradesh, India”. Journal of Spices and Aromatic Crops, vol. 9, no. 1, June 2000, p. 77, https://www.updatepublishing.com/journal/index.php/josac/article/view/4559.