@article{SF_1990__40_1_135021,
     author = {W.A.F. Ruppert},
     title = {On group topologies and idempotents in weak almost periodic compactifications.},
     journal = {Semigroup forum},
     pages = {227--238},
     publisher = {mathdoc},
     volume = {40},
     number = {1},
     year = {1990},
     zbl = {0689.22003},
     url = {http://geodesic.mathdoc.fr/item/SF_1990__40_1_135021/}
}