sci
hub

to open science
Sedano, Fernando; Kempeneers, Pieter; Hurtt, George . (2014). A Kalman Filter-Based Method to Generate Continuous Time Series of Medium-Resolution NDVI Images. Remote Sensing, 6(12), 12381–12408. doi:10.3390/rs61212381 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research