Pakum, Wittaya, et al. “Influence of Medium Component on In Vitro Propagation of Thai’s Endangered Orchid: Bulbophyllum Nipondhii Seidenf”. Plant Tissue Culture and Biotechnology, vol. 26, no. 1, Sept. 2016, pp. 37-46, doi:10.3329/ptcb.v26i1.29765.