sci
hub

to open science
José Barluenga; Iván Pérez-Sánchez; Eduardo Rubio; Josefa Flórez. (2003). Three/Four/Five-Component Diastereoselective Cyclization of Fischer Carbene Complexes, Lithium Enolates, and Allylmagnesium Bromide. , 42(47), 5860–5863. doi:10.1002/anie.200352489 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research