@article{SM_1974_23_4_a2,
     author = {B. S. Kashin},
     title = {On unconditional convergence in the space~$L_1$},
     journal = {Sbornik. Mathematics},
     pages = {509--519},
     publisher = {mathdoc},
     volume = {23},
     number = {4},
     year = {1974},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1974_23_4_a2/}
}