@article{DM_1989_1_4_a4,
     author = {A. E. Andreev},
     title = {The complexity of realizing partial {Boolean} functions by schemes consisting of functional elements},
     journal = {Diskretnaya Matematika},
     pages = {251--261},
     publisher = {mathdoc},
     volume = {1},
     number = {4},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1989_1_4_a4/}
}