@article{SLC_2000-2001_45_a4,
     author = {Mervyn C. Hughes and Alun O. Morris},
     title = {Root {Systems} for {Two} {Dimensional} {Complex} {Reflection} {Groups}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {2000-2001},
     volume = {45},
     url = {http://geodesic.mathdoc.fr/item/SLC_2000-2001_45_a4/}
}