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Susana M.M. Lopes; Cláudio M. Nunes; Teresa M.V.D. Pinho e Melo. (2010). 4-Isoxazolines and pyrroles from allenoates. , 66(32), 6078–6084. doi:10.1016/j.tet.2010.06.010 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research