@article{2643, author = {Larsen, R.}, title = {A theorem concerning Ditkin's condition}, journal = {Portugaliae mathematica}, volume = {30}, year = {1971}, pages = {17-20}, zbl = {0229.46053}, mrnumber = {0301511}, language = {en}, url = {http://dml.mathdoc.fr/item/2643} }
Larsen, R. A theorem concerning Ditkin's condition. Portugaliae mathematica, Tome 30 (1971) pp. 17-20. http://gdmltest.u-ga.fr/item/2643/