Magar, L. B., N. Shrestha, S. Khadka, J. R. Joshi, J. Acharya, G. C. Gyanwali, B. P. Marasini, S. Rajbahak, and N. Parajuli. “Challenges and Opportunity of in Vitro Propagation of Paulownia Tomentosa Steud for Commercial Production in Nepal”. International Journal of Applied Sciences and Biotechnology, vol. 4, no. 2, June 2016, pp. 155-60, doi:10.3126/ijasbt.v4i2.14752.