@article{10_4153_CJM_1985_017_9,
     author = {Gerhard, J. A. and Petrich, Mario},
     title = {Free {Involutorial} {Completely} {Simple} {Semigroups}},
     journal = {Canadian journal of mathematics},
     pages = {271--295},
     year = {1985},
     volume = {37},
     number = {2},
     doi = {10.4153/CJM-1985-017-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1985-017-9/}
}