Comparision of pharmacokinetics between ropivacaine methanesulfonate and ropivacaine hydrochloride during epidural block
CAI Mei-hua, ZHANG Ma-zhong, RONG Zheng-xing, et al
. 2011, (5): 584 .  DOI: 10.3969/j.issn.1674-8115.2011.05.013