sci
hub

to open science
Yasuo Kudoh. (1996). Properties of polypyrrole prepared by chemical polymerization using aqueous solution containing Fe2(SO4)3 and anionic surfactant. , 79(1), 0–22. doi:10.1016/0379-6779(96)80124-x 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research