@article{SF_1976__12_134159,
     author = {A Pollatchek},
     title = {Relationships between conbinatorics and 0-simple semigroups.},
     journal = {Semigroup forum},
     pages = {78--82},
     publisher = {mathdoc},
     volume = {12},
     year = {1976},
     zbl = {0322.20029},
     url = {http://geodesic.mathdoc.fr/item/SF_1976__12_134159/}
}