@article{DE_1974_10_9_a8,
     author = {Yu. A. Melentsova and G. N. Mil'shtein},
     title = {Optimal estimation of the interval of solvability of a multipoint boundary value problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1630--1641},
     publisher = {mathdoc},
     volume = {10},
     number = {9},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1974_10_9_a8/}
}