@article{10_4153_CJM_1967_034_1,
     author = {Warne, R. J.},
     title = {Extensions of {I-Bisimple} {Semigroups}},
     journal = {Canadian journal of mathematics},
     pages = {419--426},
     year = {1967},
     volume = {19},
     number = {1},
     doi = {10.4153/CJM-1967-034-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1967-034-1/}
}