Gerasimos Marketos Elias Frentzos Irene Ntoutsi Nikos Pelekis Alessandra Raffaetà Yannis Theodoridis Building real-world trajectory warehouses. 8-15 2008 MobiDE http://doi.acm.org/10.1145/1626536.1626539 conf/mobide/2008 db/conf/mobide/mobide2008.html#MarketosFNPRT08