"Electronically modified polymer-supported cinchona phase-transfer catalysts for asymmetric synthesis of a -alkyl-a -amino acid derivatives.",
Shi, Qinghua; Lee, Yeon-Ju; Song, Hongrui; Cheng, Maosheng; Jew, Sang-sup; Park, Hyeung-geun; Jeong, Byeong-Seon.
Chemistry Letters (2008), 37(4), 436-437.