Haijun Cao

The efficacy and safety of ropinirole prolonged release tablets as adjunctive therapy in Chinese subjects with advanced Parkinson's disease: a multicenter, double-blind, randomized, placebo-controlled study.

Baorong Zhang, Zhenxin Zhang, Shengdi Chen, 2013, Parkinsonism & related disorders.

A single and multiple dose study to investigate the pharmacokinetics of a prolonged release formulation of ropinirole in healthy Chinese subjects

Tao Liu, Xia Chen, Ji Jiang, 2014, Clinical pharmacology in drug development.