@article{SM_1968_4_1_a0,
     author = {A. O. Gel'fond},
     title = {Some combinatorial properties of $(0,1)$-matrices},
     journal = {Sbornik. Mathematics},
     pages = {1},
     year = {1968},
     volume = {4},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1968_4_1_a0/}
}