@article{IVM_1991_10_a7,
     author = {N. A. Koreshkov},
     title = {An invariant of the algebra~$W_n$},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {40--42},
     publisher = {mathdoc},
     number = {10},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1991_10_a7/}
}