@article{VMUMM_2004_3_a10,
     author = {A. B. Ugol'nikov},
     title = {Complexity of realization for a certain sequence of functions of $4$-valued logic by formulas},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {52--55},
     publisher = {mathdoc},
     number = {3},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2004_3_a10/}
}