Thapa, Chandra Bahadur, Krishna Kumar Pant, Hari Datta Bhattarai, and Bijaya Pant. 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.