Thi Viet Nga, C., Thi Nhu Quynh, N. and Quang Nam, V. 2025. In vitro propagation of Paphiopedilum helenea Aver. Journal of Forestry Science and Technology. 10, 1 (May 2025), 003–010. DOI:https://doi.org/10.55250/Jo.vnuf.10.1.2025.003-010.