@article{SF_1989__39_2_134975,
     author = {D. Helmer and N. Isik},
     title = {Construction of right topological compactifications for discrete versions of subsemigroups of compact groups.},
     journal = {Semigroup forum},
     pages = {65--74},
     publisher = {mathdoc},
     volume = {39},
     number = {2},
     year = {1989},
     zbl = {0665.22002},
     url = {http://geodesic.mathdoc.fr/item/SF_1989__39_2_134975/}
}