◂
sci
hub

to open science
Feng, Jia; Li, Xiamiao; Mao, Baohua; Xu, Qi; Bai, Yun . (2017). Weighted complex network analysis of the Beijing subway system: Train and passenger flows. Physica A: Statistical Mechanics and its Applications, 474(), 213–223. doi:10.1016/j.physa.2017.01.085 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research