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Chang, Yu-Jie; Liu, Xi-Zhen; Zhao, Qing; Yang, Xiao-Hai; Wang, Ke-Min; Wang, Qing; Lin, Min; Yang, Meng . (2015). P(VPBA-DMAEA) as a pH-sensitive nanovalve for mesoporous silica nanoparticles based controlled release. Chinese Chemical Letters, (), S1001841715003253–. doi:10.1016/j.cclet.2015.08.005 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research