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Pedrycz, Witold. (2021). [Intelligent Systems Reference Library] An Introduction to Computing with Fuzzy Sets Volume 190 (Analysis, Design, and Applications) || . , 10.1007/978-3-030-52800-3(), –. doi:10.1007/978-3-030-52800-3 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research