@article{IVM_1969_10_a11,
     author = {L. L. Tsinman},
     title = {A~theorem on normal proofs in the theory of regular formulae},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {90--96},
     publisher = {mathdoc},
     number = {10},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1969_10_a11/}
}