Phuong, N. T. D., & Huong, T. T. X. (2018). Effect of natural auxin from portulaca grandiflora hook and Ipomoea batatas (L.) Poir on the formation adventitious roots in vitro of Plumbago zeylanica L. Ho Chi Minh City Open University Journal of Science - Engineering and Technology, 8(2), 30–37. https://doi.org/10.46223/HCMCOUJS.tech.en.8.2.344.2018