@article{IM2_1970_4_6_a7,
     author = {A. M. Sedletskii},
     title = {On functions periodic in the mean},
     journal = {Izvestiya. Mathematics},
     pages = {1406--1428},
     year = {1970},
     volume = {4},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1970_4_6_a7/}
}