@article{DAN_1985_283_5_a0,
     author = {M. S. Almamedov and A. A. Aslanov and G. A. Isaev},
     title = {On the theory of two-parameter spectral problems},
     journal = {Doklady Akademii Nauk},
     pages = {1033--1035},
     publisher = {mathdoc},
     volume = {283},
     number = {5},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1985_283_5_a0/}
}