@article{TMF_1992_90_3_a6,
     author = {\'E. A. Tagirov},
     title = {Quantum mechanics in {Riemannian} {spacetime.~II.} {Operators} of observables},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {412--423},
     year = {1992},
     volume = {90},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1992_90_3_a6/}
}