@article{MAN_1967__171_161553,
     author = {D.A. MATTSON},
     title = {Separation {Relations} and {Quasi-Proximities.}},
     journal = {Mathematische Annalen},
     pages = {87--92},
     publisher = {mathdoc},
     volume = {171},
     year = {1967},
     zbl = {0163.44502},
     url = {http://geodesic.mathdoc.fr/item/MAN_1967__171_161553/}
}