@article{DE_1995_31_7_a16,
     author = {N. I. Ionkin and E. A. Valikova},
     title = {The maximum principle for a nonlocal nonselfadjoint boundary value problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1232--1239},
     publisher = {mathdoc},
     volume = {31},
     number = {7},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1995_31_7_a16/}
}