@article{MZM_1985_37_5_a13,
     author = {V. K. Romanko},
     title = {Nonlocal boundary problems for certain systems of equations},
     journal = {Matemati\v{c}eskie zametki},
     pages = {727--733},
     publisher = {mathdoc},
     volume = {37},
     number = {5},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1985_37_5_a13/}
}