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Blancafort, Lluís; Adam, Waldemar; González, David; Olivucci, Massimo; Vreven, Thom; Robb, Michael A. . (1999). Theoretical Study of the 1,2 Rearrangement of Housane Radical Cations:  Key Role of a Transient Cyclopentane-1,3-diyl Intermediate. Journal of the American Chemical Society, 121(45), 10583–10590. doi:10.1021/ja991441p 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research