@article{IVM_1973_8_a3,
     author = {V. V. Borzov},
     title = {Piecewise polynomial approximations of functions of classes $\mathring W_p^r$ in $L_q$ with respect to an infinite measure},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {19--28},
     publisher = {mathdoc},
     number = {8},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1973_8_a3/}
}