@article{PORMA_1971__30_1_115133,
     author = {Larsen, R.},
     title = {A theorem concerning {Ditkin's} condition},
     journal = {Portugaliae mathematica},
     pages = {17--20},
     publisher = {mathdoc},
     volume = {30},
     number = {1},
     year = {1971},
     mrnumber = {0301511},
     zbl = {0229.46053},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1971__30_1_115133/}
}