@article{SF_1994__48_3_135316,
     author = {J. Pym and D. Strauss and A. El-Mabhouh},
     title = {On the two natural products in a {Stone-Cech} compactification .},
     journal = {Semigroup forum},
     pages = {255--257},
     publisher = {mathdoc},
     volume = {48},
     number = {3},
     year = {1994},
     zbl = {0796.22003},
     url = {http://geodesic.mathdoc.fr/item/SF_1994__48_3_135316/}
}