@article{IVM_1979_11_a5,
     author = {L. V. Nasonova},
     title = {Approximation of functions with variable smoothness in the $L_p$ metric},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {48--54},
     year = {1979},
     number = {11},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1979_11_a5/}
}