@article{10_4064_cm_31_1_115_123,
     author = {Edward Beckenstein and Lawrence Narici and Charles Suffel},
     title = {A note on permanently singular elements in topological algebras},
     journal = {Colloquium Mathematicum},
     pages = {115--123},
     publisher = {mathdoc},
     volume = {31},
     number = {1},
     year = {1974},
     doi = {10.4064/cm-31-1-115-123},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-31-1-115-123/}
}