@article{DE_1967_3_10_a4,
     author = {R. G. Mukharlyamov},
     title = {On inverse problems of the qualitative theory of differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1673--1681},
     publisher = {mathdoc},
     volume = {3},
     number = {10},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1967_3_10_a4/}
}