@article{DAN_1974_219_3_a20,
     author = {A. A. Voronkov and V. V. Ilyukhin and N. V. Belov},
     title = {On principles of the formation of mixed frameworks and their formula},
     journal = {Doklady Akademii Nauk},
     pages = {600--603},
     publisher = {mathdoc},
     volume = {219},
     number = {3},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_219_3_a20/}
}