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R.E. Nightingale; G.L. Tingey. (1969). Chemistry and physics of carbon: (Edited by P. L. WALKER, Jr.), volume 3. Marcel Dekker, New York (1968). xii + 449 pp.. , 7(1), 202–203. doi:10.1016/0008-6223(69)90021-9 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research