%0 Journal Article %A A. D. Korshunov %T The number of $k$-nonseparated families of subsets of an $n$-element set ($k$-nonseparated Boolean functions). I. The case of even $n$ and $k=2$ %J Diskretnyj analiz i issledovanie operacij %D 2003 %P 31-69 %V 10 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DA_2003_10_4_a2/ %G ru %F DA_2003_10_4_a2