sci
hub

to open science
I. Maeng; C. Kang; S. J. Oh; J. Son; K. H. An; Y. H. Lee. (2007). Terahertz electrical and optical characteristics of double-walled carbon nanotubes and their comparison with single-walled carbon nanotubes. , (), –. doi:10.1063/1.2435338 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research