@article{VMUMM_1988_5_a17,
     author = {N. A. Pankrat'ev},
     title = {The language of {Turing} machines from the point of view of optimality},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {66--68},
     publisher = {mathdoc},
     number = {5},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1988_5_a17/}
}