%0 Journal Article %A A. D. Rusakou %T On nonsemiassociativity of polyadic operation $\eta_{s, \sigma, k}$ %J Problemy fiziki, matematiki i tehniki %D 2017 %P 68-72 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/PFMT_2017_1_a10/ %G ru %F PFMT_2017_1_a10