@article{TM_1964_72_a2,
     author = {S. Yu. Maslov},
     title = {On {E.\,L.~Post's} ``tag problem''},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {57--68},
     publisher = {mathdoc},
     volume = {72},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1964_72_a2/}
}