Singh, B. M., C. Wawrosch, S. D. Joshi, and B. Kopp. “Micropropagation of Butea Buteiformis (Voigt) Grierson and Long”. Nepal Journal of Science and Technology, vol. 7, Aug. 2007, pp. 119-22, https://nepjol.info./index.php/NJST/article/view/582.