@article{DAN_1966_169_3_a11,
     author = {P. L. Ul'yanov},
     title = {Absolute and unconditional convergence},
     journal = {Doklady Akademii Nauk},
     pages = {536--538},
     publisher = {mathdoc},
     volume = {169},
     number = {3},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_169_3_a11/}
}