@article{SF_1996__52_3_135461,
     author = {N. Hindman and D. Strauss},
     title = {Prime properties of the smallest ideal of {{\ss}N.}},
     journal = {Semigroup forum},
     pages = {357--364},
     publisher = {mathdoc},
     volume = {52},
     number = {3},
     year = {1996},
     zbl = {0867.22002},
     url = {http://geodesic.mathdoc.fr/item/SF_1996__52_3_135461/}
}