Hiep, P. D.; Minh, N. T.; Huyen, P. X.; Hung, C. D.; Khiem, D. V.; Thanh Hang, N. T. A Study on Effects of Plant Growth Regulators on the Morphogenesis of Hibiscus Sagittifolius Kurz under in Vitro Conditions. AJB 2014, 36, 266-271.