@article{NSJOM_2007_37_1a_1,
     author = {D. A. Romano},
     title = {A note on the quasi-antiorder in a

 semigroup},
     journal = {Novi Sad Journal of Mathematics},
     pages = {3-9},
     year = {2007},
     volume = {37},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2007_37_1a_1/}
}