@article{MASLO_1981__31_2_a8,
     author = {Pulmannov\'a, Sylvia},
     title = {A note on the extensibility of states},
     journal = {Mathematica slovaca},
     pages = {177--181},
     publisher = {mathdoc},
     volume = {31},
     number = {2},
     year = {1981},
     mrnumber = {611630},
     zbl = {0469.03044},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1981__31_2_a8/}
}