Synthesis of Novel Chiral Bisoxazoline Ligands Containing 2,5-Diaryl-1,3,4-oxadiazole and Enantioselective Cyclopropanation of Styrene - Du, Da-Ming; Wang, Zhan-Yue; Xu, Dong-Cheng; Hua, Wen-Ting (Synthesis, 2002)