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Xue, H.G.; Sun, Fang Hong; Ma, Y.P.; Chen, Ming . (2007). Deposition of Smooth Diamond Films with High Adhesive Strength on WC-Co Inserts and Their Cutting Performance in Turning GFRP. Key Engineering Materials, 329(), 755–760. doi:10.4028/www.scientific.net/kem.329.755 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research