@article{DMGAA_2000_20_1_a5,
     author = {Ren, Xue and Shum, Kar-Ping},
     title = {A structure theorem for right pp-semigroups with left central idempotents},
     journal = {Discussiones Mathematicae. General Algebra and Applications},
     pages = {63--75},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGAA_2000_20_1_a5/}
}