@article{10_2298_PIM0795095R,
     author = {Daniel Romano},
     title = {On {Regular} {Anti-congruence} in {Anti-ordered} {Semigroups}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {95 },
     publisher = {mathdoc},
     volume = {_N_S_81},
     number = {95},
     year = {2007},
     doi = {10.2298/PIM0795095R},
     zbl = {1247.03133},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/PIM0795095R/}
}