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Amraee, I. Amiri; Katbab, A. A.; Aghafarajollah, Sh . (1996). Qualitative and Quantitative Analysis of SBR/BR Blends by Thermogravimetric Analysis. Rubber Chemistry and Technology, 69(1), 130–136. doi:10.5254/1.3538353 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research