@article{DAN_1962_143_6_a15,
     author = {V. A. Tupchiev},
     title = {The asymptotic behavior of the solution of a boundary-value problem for a system of first-order 
},
     journal = {Doklady Akademii Nauk},
     pages = {1296--1299},
     publisher = {mathdoc},
     volume = {143},
     number = {6},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_143_6_a15/}
}