@article{DA_2008_15_6_a4,
     author = {S. S. Marchenkov and V. S. Fedorova},
     title = {On solutions of systems of functional {Boolean} equations},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {48--57},
     publisher = {mathdoc},
     volume = {15},
     number = {6},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2008_15_6_a4/}
}