@article{DAN_1961_136_3_a2,
     author = {\'E. A. Asadullin},
     title = {Tests for convergence of multiple series with positive terms},
     journal = {Doklady Akademii Nauk},
     pages = {529--531},
     publisher = {mathdoc},
     volume = {136},
     number = {3},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_136_3_a2/}
}