@article{DAN_1965_165_4_a3,
     author = {G. P. Karev and S. A. Treskov and G. Sh. Fridman},
     title = {Estimate of complexity for a function of the algebra of logic},
     journal = {Doklady Akademii Nauk},
     pages = {745--747},
     publisher = {mathdoc},
     volume = {165},
     number = {4},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_165_4_a3/}
}