@article{DA_2013_20_4_a1,
     author = {Yu. L. Vasil'ev and K. L. Rychkov},
     title = {A lower bound on formula size of a~ternary linear function},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {15--26},
     publisher = {mathdoc},
     volume = {20},
     number = {4},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2013_20_4_a1/}
}