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Min, Byoung-Chul; Motohashi, Kazunari; Lodder, Cock; Jansen, Ron. (2006). Tunable spin-tunnel contacts to silicon using low-work-function ferromagnets. , 5(10), 817–822. doi:10.1038/nmat1736 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research