@article{DAN_1969_189_1_a16,
     author = {I. V. Shragin},
     title = {Nemytskii operator in spaces generated by gen-functions},
     journal = {Doklady Akademii Nauk},
     pages = {63--66},
     publisher = {mathdoc},
     volume = {189},
     number = {1},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_189_1_a16/}
}