@article{MABA_1990_4_2_a8,
     author = {M. Ouannasser},
     title = {A {Remark} on the {Class} {A1} (in {French)}},
     journal = {Mathematica balkanica},
     pages = {203},
     publisher = {mathdoc},
     volume = {4},
     number = {2},
     year = {1990},
     url = {http://geodesic.mathdoc.fr/item/MABA_1990_4_2_a8/}
}