Robert Fidytek Andrzej Wlodzimierz Mostowski Rafal Somla Andrzej Szepietowski Algorithms counting monotone Boolean functions. 203-209 2001 79 Inf. Process. Lett. 5 db/journals/ipl/ipl79.html#FidytekMSS01 http://dx.doi.org/10.1016/S0020-0190(00)00230-1