@article{MASLO_1987__37_2_a2,
     author = {Kossaczk\'y, Igor},
     title = {Green's relations and regular elements of transformation semigroups},
     journal = {Mathematica slovaca},
     pages = {159--168},
     publisher = {mathdoc},
     volume = {37},
     number = {2},
     year = {1987},
     mrnumber = {899431},
     zbl = {0613.20043},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1987__37_2_a2/}
}