The Railway Traveling Salesman Problem. - Georgia Hadjicharalambous; Petrica C. Pop; Evangelia Pyrga; George Tsaggouris; Christos D. Zaroliagis (ATMOS, 2004)

Non-additive Shortest Paths. - George Tsaggouris; Christos D. Zaroliagis (ESA, 2004)

QoS-aware Multicommodity Flows and Transportation Planning. - George Tsaggouris; Christos D. Zaroliagis (ATMOS, 2006)

Multiobjective Optimization: Improved FPTAS for Shortest Paths and Non-Linear Objectives with Applications. - George Tsaggouris; Christos D. Zaroliagis (Theory Comput. Syst., 2009)