@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/}
}