Mohamed El-Darieby Dorina C. Petriu Jerry Rolia A hierarchical distributed protocol for MPLS path creation. 920-926 http://doi.ieeecomputersociety.org/10.1109/ISCC.2002.1021782 2002 conf/iscc/2002 ISCC db/conf/iscc/iscc2002.html#El-DariebyPR02