@article{IVM_1991_11_a2,
     author = {A. A. Budagov},
     title = {Moduli of continuity of permutations, and multiplicative inequalities},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {13--19},
     year = {1991},
     number = {11},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1991_11_a2/}
}