Panday, S., Kumar, V., Dash, S. S., Sinha, B. K. and singh, P. (2019) “Bhutan Asiabell Codonopsis bhutanica Ludlow (Asterales: campanulaceae): a new addition to the Indian flora”, Journal of Threatened Taxa, 11(15), pp. 15079–15082. doi: 10.11609/jott.4708.11.15.15079-15082.