@article{GDZPPN002347997, title = {On Weak Separation of Convex Sets and on ...-Ubiquitous Sets.}, journal = {Mathematica Scandinavica}, volume = {16}, year = {1965}, pages = {55-74}, zbl = {0137.09401}, url = {http://dml.mathdoc.fr/item/GDZPPN002347997} }
Stenberg, Warren. On Weak Separation of Convex Sets and on ...-Ubiquitous Sets.. Mathematica Scandinavica, Tome 16 (1965) pp. 55-74. http://gdmltest.u-ga.fr/item/GDZPPN002347997/