@article{DAN_1960_132_5_a5,
     author = {M. M. Dzhrbashyan and R. M. Martirosyan},
     title = {On the general theory of biorthogonal kernels},
     journal = {Doklady Akademii Nauk},
     pages = {994--997},
     publisher = {mathdoc},
     volume = {132},
     number = {5},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_132_5_a5/}
}