@article{PORMA_1942__3_2_114600,
     author = {Tukey, J.W.},
     title = {Some notes on the separation of convex sets},
     journal = {Portugaliae mathematica},
     pages = {95--102},
     year = {1942},
     volume = {3},
     number = {2},
     mrnumber = {0006606},
     zbl = {0028.23202},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1942__3_2_114600/}
}