Tra, P., Vu, P. and Quach, P. 2016. Induction of Platycodon grandiflorum hairy roots through the mediation of four Agrobacterium rhizogenes strains. Science and Technology Development Journal. 19, 4 (Dec. 2016), 64-75. DOI:https://doi.org/https://doi.org/10.32508/stdj.v19i4.624.