S. Sioutas, C. Makris, N. Kitsios, G. Lagogiannis, J. Tsaknakis, K. Tsichlas, B. Vassiliadis: Geometric Retrieval for Grid Points in the RAM Model /jucs_10_9/geometric_retrieval_for_grid
S. Sioutas, K. Tsichlas, B. Vassiliadis, D. Tsolis: Efficient Access Methods for Temporal Interval Queries of Video Metadata /jucs_13_10/efficient_access_methods_for