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Savchuk, M.M. and Burlaka, M.K. 2019. Encoding and classification of permutations b? special conversion with estimates of class power. Bulletin of Taras Shevchenko National University of Kyiv. Physics and Mathematics. 2 (Apr. 2019), 36–43. DOI:https://doi.org/10.17721/1812-5409.2019/2.3.