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L. Duò; P. Vavassori; R. Bertacco. (1995). Effects of Ce vs. Lu substitution on the electronic structure of rare earth-transition metal compounds. , 225(1-2), 0–435. doi:10.1016/0925-8388(94)07047-4 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research