Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1972_11_1_a12, author = {V. M. Khrapchenko}, title = {The complexity of the realization of symmetrical functions by formulae}, journal = {Matemati\v{c}eskie zametki}, pages = {109--120}, publisher = {mathdoc}, volume = {11}, number = {1}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1972_11_1_a12/} }
V. M. Khrapchenko. The complexity of the realization of symmetrical functions by formulae. Matematičeskie zametki, Tome 11 (1972) no. 1, pp. 109-120. http://geodesic.mathdoc.fr/item/MZM_1972_11_1_a12/