@article{10_21136_CMJ_1969_100898,
     author = {Sedlock, James T.},
     title = {Green's relations on a periodic semigroup},
     journal = {Czechoslovak Mathematical Journal},
     pages = {318--323},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {1969},
     doi = {10.21136/CMJ.1969.100898},
     mrnumber = {0244426},
     zbl = {0214.03504},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1969.100898/}
}