Abdelilah Maach Gregor von Bochmann H. T. Mouftah An optimal shared protection scheme for optical networks. 71 2005 conf/aiccsa/2005 AICCSA http://doi.ieeecomputersociety.org/10.1109/AICCSA.2005.1387065 db/conf/aiccsa/aiccsa2005.html#MaachBM05