@article{PIM_1993_N_S_53_67_a4,
     author = {Branka Alimpi\'c and Dragica N. Krgovi\'c},
     title = {Completely {Regular} and {Orthodox} {Congruences} on {Regular} {Semigroups}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {37 },
     publisher = {mathdoc},
     volume = {_N_S_53},
     number = {67},
     year = {1993},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1993_N_S_53_67_a4/}
}