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Alexander J.C. Kuehne; Allan R. Mackintosh; R.A. Pethrick; Bernd Tieke. (2008). Novel vinyl ether functionalized fluorene polymers for active incorporation into common photoresist matrices. , 49(32), 4722–4724. doi:10.1016/j.tetlet.2008.05.133 

An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research