@article{TRSPY_1999_226_a12,
     author = {V. V. Fock and L. O. Chekhov},
     title = {Quantum {Mapping} {Class} {Group,} {Pentagon} {Relation,} and {Geodesics}},
     journal = {Informatics and Automation},
     pages = {163--179},
     publisher = {mathdoc},
     volume = {226},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1999_226_a12/}
}