Thapa, C. B., Pant, K. K., Bhattarai, H. D., & Pant, B. (2022). In vitro Induction and Proliferation of Callus in Piper longum L. through Leaf Culture. Nepal Journal of Science and Technology, 21(1), 13–22. https://doi.org/10.3126/njst.v21i1.49892