@article{MAN_1993__295_1_165059,
     author = {Johan F. Aarnes},
     title = {Pure quasi-states and extremal quasi-measures.},
     journal = {Mathematische Annalen},
     pages = {575--588},
     publisher = {mathdoc},
     volume = {295},
     number = {1},
     year = {1993},
     zbl = {0791.46028},
     url = {http://geodesic.mathdoc.fr/item/MAN_1993__295_1_165059/}
}