Holger Kache, Wook-Shin Han, Volker Markl, Vijayshankar Raman, Stephan Ewen. POP/FED: Progressive Query Optimization for Federated Queries in DB2. In Umeshwar Dayal, Kyu-Young Whang, David B. Lomet, Gustavo Alonso, Guy M. Lohman, Martin L. Kersten, Sang Kyun Cha, Young-Kuk Kim, editors, Proceedings of the 32nd International Conference on Very Large Data Bases, Seoul, Korea, September 12-15, 2006. pages 1175-1178, ACM, 2006. [doi]