Bhattacharya, Ashoke. “Impact of Floral Density on Pollination Success Rate and Fruit Set of Calceolaria Gracilis Kunth in Darjeeling Himalaya”. Current Botany 8 (November 5, 2017). Accessed April 23, 2025. https://updatepublishing.com/journal/index.php/cb/article/view/3256.