@article{MABA_2006_20_3-4_a2,
     author = {A. N. El-Kassar and H. Y. Chehade},
     title = {Generalized {Group} of {Units}},
     journal = {Mathematica balkanica},
     pages = {275},
     publisher = {mathdoc},
     volume = {20},
     number = {3-4},
     year = {2006},
     url = {http://geodesic.mathdoc.fr/item/MABA_2006_20_3-4_a2/}
}