Xavier Masip-Bruin Sergio Sánchez-López Josep Solé-Pareta Jordi Domingo-Pascual Eva Marín-Tordera Hierarchical Routing with QoS Constraints in Optical Transport Networks. 662-674 http://dx.doi.org/10.1007/978-3-540-24693-0_55 2004 conf/networking/2004 NETWORKING db/conf/networking/networking2004.html#Masip-BruinSSDM04