@article {journals/dke/VakaliTBE03, title = {Hierarchical data placement for navigational multimedia applications}, journal = {Data Knowl. Eng.}, volume = {44}, number = {1}, year = {2003}, pages = {49-80}, author = {Athena Vakali and Terzi, Evimaria and Bertino, Elisa and Elmagarmid, Ahmed K.} }