@article{DAN_1958_120_5_a3,
     author = {M. D. Dolberg},
     title = {The development of a positive kernel into a bilinear series},
     journal = {Doklady Akademii Nauk},
     pages = {945--948},
     publisher = {mathdoc},
     volume = {120},
     number = {5},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_120_5_a3/}
}