@article{DAN_1976_226_3_a3,
     author = {M. A. Krasnosel'skii and A. V. Pokrovskii},
     title = {Regular solutions of equations with discontinuous nonlinearities},
     journal = {Doklady Akademii Nauk},
     pages = {506--509},
     publisher = {mathdoc},
     volume = {226},
     number = {3},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_226_3_a3/}
}