Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1971_10_1_a11, author = {V. M. Khrapchenko}, title = {Method of determining lower bounds for the complexity of $P$-schemes}, journal = {Matemati\v{c}eskie zametki}, pages = {83--92}, publisher = {mathdoc}, volume = {10}, number = {1}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1971_10_1_a11/} }
V. M. Khrapchenko. Method of determining lower bounds for the complexity of $P$-schemes. Matematičeskie zametki, Tome 10 (1971) no. 1, pp. 83-92. http://geodesic.mathdoc.fr/item/MZM_1971_10_1_a11/