@article{SF_1981__23_134507,
     author = {W. Ruppert},
     title = {A note on peripherally problems in the theory of compact semitopological monoids.},
     journal = {Semigroup forum},
     pages = {89--94},
     year = {1981},
     volume = {23},
     zbl = {0473.22001},
     url = {http://geodesic.mathdoc.fr/item/SF_1981__23_134507/}
}