Gusev, Sergey V. ; Vernikov, Boris M. Two weaker variants of congruence permutability for monoid varieties Semigroup Forum 103, No. 1, 106-152 (2021) : [review]Henno, JaakzbMATH Open2022 / 1 p. https://zbmath.org/1484.20100 Pattern matching for superpositional graphs and separable permutationsTombak, Mati; Loorits, Neeme; Peder, Ahti; Võhandu, LeoAbstracts of Eleventh International Conference Permutation Patterns 20132013 / p. 64-66 Song, Wei; Zheng, Yu; Fu, Chong; Shan, Pufang. A novel batch image encryption algorithm using parallel computing : [review]Henno, JaakZentralblatt MATH2020 / 1 p https://www.zbmath.org/?q=an:07333047