@article{PIM_1979_N_S_25_39_a31,
     author = {Aleksandar Torga\v{s}ev},
     title = {Characteristic {Matrix} {Functions} {On} {Functions} {On} {Wachs} {Spaces,} {I} {(Liv\v{s}its} {Definition)}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {225 },
     publisher = {mathdoc},
     volume = {_N_S_25},
     number = {39},
     year = {1979},
     url = {http://geodesic.mathdoc.fr/item/PIM_1979_N_S_25_39_a31/}
}