@article{DAN_1992_326_1_a8,
     author = {N. N. Tarkhanov and A. A. Shlapunov},
     title = {Bases with double orthogonality in the {Cauchy} problem for systems},
     journal = {Doklady Akademii Nauk},
     pages = {45--49},
     publisher = {mathdoc},
     volume = {326},
     number = {1},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1992_326_1_a8/}
}