Yuanyuan Yang Jianchao Wang Routing Permutations on Optical Baseline Networks with Node-Disjoint Paths. 65-72 2004 conf/icpads/2004 ICPADS http://doi.ieeecomputersociety.org/10.1109/ICPADS.2004.74 db/conf/icpads/icpads2004.html#YangW04