@article{TMF_1973_14_3_a7,
     author = {I. Lukach},
     title = {A complete set of quantum-mechanical observables on a two-dimensional sphere},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {366--380},
     publisher = {mathdoc},
     volume = {14},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1973_14_3_a7/}
}