@article{SF_1992__45_3_135182,
     author = {K. Ciesielski and L. Larson and K. Ostaszewski},
     title = {Semigroups of ...-density continuous  functions.},
     journal = {Semigroup forum},
     pages = {191--204},
     publisher = {mathdoc},
     volume = {45},
     number = {3},
     year = {1992},
     zbl = {0773.26002},
     url = {http://geodesic.mathdoc.fr/item/SF_1992__45_3_135182/}
}