Huy, N.P. et al. 2018. Shoot multiplication via elongated stem node culture under darkness: a novel method in micropropagation of Paphiopedilum villosum. Vietnam Journal of Biotechnology. 16, 3 (Dec. 2018), 491–499. DOI:https://doi.org/10.15625/1811-4989/16/3/13471.