Khoa, T.T., Duy, P.M., Huong, T.T. and Quynh, N.T. 2021. Effects of <i> in vitro </i> plant ages on the subsequent growth of <i> Plumbago indica </i> l. after <i> ex vitro </i> transplantation. Academia Journal of Biology. 43, 1 (Mar. 2021). DOI:https://doi.org/10.15625/2615-9023/15798.