@article{PFMT_2018_2_a10,
     author = {A. D. Rusakou and M. V. Selkin},
     title = {New criteria of associativity of $l$-ary operation $\eta_{s,\sigma,k}$},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {76--79},
     publisher = {mathdoc},
     number = {2},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2018_2_a10/}
}