@article{DA_2000_7_3_a5,
     author = {D. Yu. Cherukhin},
     title = {Lower bounds for the formula complexity of symmetric {Boolean} functions},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {86--98},
     publisher = {mathdoc},
     volume = {7},
     number = {3},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2000_7_3_a5/}
}