@article{TRSPY_1987_180_a96,
     author = {L. V. Nasonova},
     title = {On a~class of functions with variable smoothness},
     journal = {Informatics and Automation},
     pages = {163--164},
     publisher = {mathdoc},
     volume = {180},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a96/}
}