Hùng, Nguyễn Văn, et al. “STUDY ON SYNTHESIS AND CYTOTOXIC ACTIVITY OF GONIOTRIOL, DIMER- GONIOTRIOL, HOWIINOL A AND THEIR PRECURSOR”. Vietnam Journal of Science and Technology, vol. 48, no. 3, June 2012, doi:10.15625/0866-708X/48/3/1136.