Mutual aid ↓save

Li, Qing-bo; Li, Zhen; Zhou, Ping; Wu, Rui-xin . (2015). Nonreciprocal self-collimation in two-dimensional gyromagnetic photonic crystals and its applications in signal separation. Applied Physics A, 121(3), 1057–1060. doi:10.1007/s00339-015-9132-1 

An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research