@article{GDZPPN002056569, title = {On some separation and mapping theorems.}, journal = {Commentarii mathematici Helvetici}, volume = {29}, year = {1955}, pages = {199-214}, zbl = {0065.16604}, url = {http://dml.mathdoc.fr/item/GDZPPN002056569} }
Bourgin, D.G. On some separation and mapping theorems.. Commentarii mathematici Helvetici, Tome 29 (1955) pp. 199-214. http://gdmltest.u-ga.fr/item/GDZPPN002056569/