@article{TMF_1970_4_3_a6,
     author = {V. N. Sushko and S. S. Horuzhy},
     title = {Vector states on algebras of observables and superselection rules
},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {341--359},
     publisher = {mathdoc},
     volume = {4},
     number = {3},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1970_4_3_a6/}
}