Freeze-Drying and in vitro Release Kinetics of Poly(ethylene glycol)- Poly( dl-lactide) Block Copolymer Micelles
YANG Zhuo-Li; LI Xin-Ru; YANG Ke-Wei; LIU Yan*
Acta Chimica Sinica . 2007, (19): 2169 -2174 .