@article{ZVMMF_1974_14_2_a28,
     author = {E. A. Trahtengerts and A. S. Shumei},
     title = {The existence of precedence functions for phrase structure grammars},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {520--522},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1974_14_2_a28/}
}