@article{DE_1987_23_3_a9,
     author = {T. Nguyẽn},
     title = {A generalized problem of {Bolza} with delay},
     journal = {Differencialʹnye uravneni\^a},
     pages = {442--450},
     publisher = {mathdoc},
     volume = {23},
     number = {3},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_3_a9/}
}