@article{VMUMM_1992_1_a3,
     author = {Yu. P. Razmyslov},
     title = {Classical operators of quantum mechanics in the modular {case.~I}},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {20--29},
     year = {1992},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1992_1_a3/}
}