F.-Y. Tian, J.-. H. Zhang, A.-H. Duan, B.-J. Wang, and L.-M. Yuan, “Chiral Separation of D,L-Mandelic Acid Using An Enantioselective Membrane Formed by Polycondensation of β-Cyclodextrin with 1,6-Diisocyanatohexane on A Polysulfone Membrane”, J. Memb. Separ. Tech., vol. 1, no. 2, pp. 72–78, Dec. 2012.