sci
hub

to open science
Shahabi, Forough; Poorahangaryan, Fereshteh; Edalatpanah, S. A.; Beheshti, Homayoun . (2020). A Multilevel Image Thresholding Approach Based on Crow Search Algorithm and Otsu Method. International Journal of Computational Intelligence and Applications, 19(02), 2050015–. doi:10.1142/S1469026820500157 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research