@article{CMUC_2004__45_1_a0,
     author = {Kelarev, A. V. and Quinn, S. J.},
     title = {A combinatorial property and power graphs of semigroups},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {1--7},
     publisher = {mathdoc},
     volume = {45},
     number = {1},
     year = {2004},
     mrnumber = {2076856},
     zbl = {1099.05042},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2004__45_1_a0/}
}