@article{RM_1964_19_1_a9,
     author = {L. Leyndler},
     title = {On unconditional convergence of trigonometric series},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1964_19_1_a9/}
}