Progressively frozen condensation crystallization of oxiracetam
DU Shichao, LI Kangli, ZHANG Yu, GAO Zhifeng, WANG Chenguang, GUO Baisong, LI Daixi, TANG Weiwei, GONG Junbo
CIESC Journal . 2015, (9): 3563 -3569 .  DOI: 10.11949/j.issn.0438-1157.20150903