All-trans retinoic acid-polyanhydride long-term delayed release formulation and feasibility
Yu Mei-li, Du Zhi, Guo Hong-yue, Sun Jin-fang, Du Xue
Chinese Journal of Tissue Engineering Research . 2011, (8): 1389 -1391 .  DOI: 10.3969/j.issn.1673-8225.2011.08.014