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Twitchen, D.J.; Pickles, C.S.J.; Coe, S.E.; Sussmann, R.S.; Hall, C.E. . (2001). Thermal conductivity measurements on CVD diamond. Diamond and Related Materials, 10(3-7), 731–735. doi:10.1016/S0925-9635(00)00515-X 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research