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TANEI, Hiroshi; NAKAMURA, Nobutomo; OGI, Hirotsugu; IKEDA, Ryuji; HIRAO, Masahiko; TAKEMOTO, Mikio . (2006). Relationship between Elastic Constants and Microstructure of Nanocrystalline CVD Diamond Thin Films. Transactions of the Japan Society of Mechanical Engineers Series A, 72(724), 1819–1824. doi:10.1299/kikaia.72.1819 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research