@article{DM_2013_25_2_a7,
     author = {V. M. Khrapchenko},
     title = {A simplified proof of a~lower complexity estimate},
     journal = {Diskretnaya Matematika},
     pages = {82--84},
     publisher = {mathdoc},
     volume = {25},
     number = {2},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2013_25_2_a7/}
}