@article{MAN_1968__175_161649,
     author = {B. AMBERG},
     title = {Fast-Polyminimaxgruppen.},
     journal = {Mathematische Annalen},
     pages = {44--49},
     year = {1968},
     volume = {175},
     url = {http://geodesic.mathdoc.fr/item/MAN_1968__175_161649/}
}