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B. B. Troitskii; L. S. Troitskaya; V. N. Myakov; A. F. Lepaev. (1973). Mechanism of the thermal degradation of poly(vinyl chloride). , 42(3), 1347–1361. doi:10.1002/polc.5070420335 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research