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Khan, Momin Hossain; Pal, Sudipta . (2015). Non-adiabatic small polaron hopping and the effect of spin-polarized tunneling in electron-doped Ca0.85Nd0.15MnO3. Applied Physics A, 119(4), 1443–1449. doi:10.1007/s00339-015-9118-z 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research