@article{ZVMMF_1981_21_2_a19,
     author = {N. N. Katerinochkina},
     title = {Search for the maximal upper zero for a class of monotone functions of $k$-valued logic},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {470--481},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1981_21_2_a19/}
}