@article{10_4153_CMB_1966_049_0,
     author = {Jr., E.J. Tully},
     title = {On {Semigroups} of {Transformations} {Acting} {Transitively} on a {Set}},
     journal = {Canadian mathematical bulletin},
     pages = {417--420},
     year = {1966},
     volume = {9},
     number = {4},
     doi = {10.4153/CMB-1966-049-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1966-049-0/}
}