@article{AL_2008_47_4_a6,
     author = {A. D. Yashin},
     title = {Branching-time type operators on finite {pseudo-Boolean} algebras},
     journal = {Algebra i logika},
     pages = {509--519},
     publisher = {mathdoc},
     volume = {47},
     number = {4},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2008_47_4_a6/}
}