@article{IM2_1987_29_3_a0,
     author = {E. S. Bozhich},
     title = {On arithmetic with the notion of {\textquotedblleft}attainable number{\textquotedblright}},
     journal = {Izvestiya. Mathematics},
     pages = {477--510},
     year = {1987},
     volume = {29},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1987_29_3_a0/}
}