@article{DAN_1961_139_5_a11,
     author = {Yu. L. Sagalovich},
     title = {Proof that a minimum number of contacts are required in the realization of a class of {Boolean} functions of $n$~variables},
     journal = {Doklady Akademii Nauk},
     pages = {1075--1076},
     publisher = {mathdoc},
     volume = {139},
     number = {5},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_139_5_a11/}
}