@article{KUKTF_1979_a7,
     author = {S. S. Musina},
     title = {Two-sided approximations of some integro-differential equations},
     journal = {Konstruktivnaya Teoriya Funktsii i Funktsional'nyi Analiz},
     pages = {61--68},
     publisher = {mathdoc},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUKTF_1979_a7/}
}