@article{RM_1969_24_4_a17,
     author = {L. M. Libkind},
     title = {A~problem in the theory of arrangement},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {24},
     number = {4},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1969_24_4_a17/}
}