@article{DAN_1984_276_4_a2,
     author = {A. P. Makhmudov},
     title = {Nonlinear multiparameter spectral problems for a system of},
     journal = {Doklady Akademii Nauk},
     pages = {786--791},
     publisher = {mathdoc},
     volume = {276},
     number = {4},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_276_4_a2/}
}