@article{BAG_1985__19_138293,
     author = {REINHARD THRON},
     title = {Characterizations of the anti-exchange closure},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {65--74},
     publisher = {mathdoc},
     volume = {19},
     year = {1985},
     zbl = {0565.06005},
     url = {http://geodesic.mathdoc.fr/item/BAG_1985__19_138293/}
}