@article{DAN_1969_185_1_a8,
     author = {N. V. Petri},
     title = {The algorithms which are connected with predicates and with {Boolean} functions},
     journal = {Doklady Akademii Nauk},
     pages = {37--39},
     publisher = {mathdoc},
     volume = {185},
     number = {1},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_185_1_a8/}
}