@article{MASLO_1994_44_2_a1,
     author = {Rie\v{c}an, Beloslav},
     title = {Representation of observables in quantum mechanical models},
     journal = {Mathematica slovaca},
     pages = {123--129},
     year = {1994},
     volume = {44},
     number = {2},
     mrnumber = {1282528},
     zbl = {0802.03041},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1994_44_2_a1/}
}