@article{TRSPY_1966_92_a3,
     author = {K. K. Golovkin},
     title = {Approximation of functions of the class $W_p^l(\Omega)$},
     journal = {Informatics and Automation},
     pages = {50--56},
     publisher = {mathdoc},
     volume = {92},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1966_92_a3/}
}