@inbook {ispoglou2015partial, title = {Partial Order Preserving Encryption Search Trees}, booktitle = {Database and Expert Systems Applications}, year = {2015}, pages = {49{\textendash}56}, publisher = {Springer International Publishing}, organization = {Springer International Publishing}, author = {Ispoglou, Kyriakos and Makris, Christos and Stamatiou, Yannis C and Elias C. Stavropoulos and Tsakalidis, Athanasios K and Iosifidis, Vasileios} } @inbook {makris2014reducing, title = {Reducing Redundant Information in Search Results Employing Approximation Algorithms}, booktitle = {Database and Expert Systems Applications}, year = {2014}, pages = {240{\textendash}247}, publisher = {Springer International Publishing}, organization = {Springer International Publishing}, author = {Makris, Christos and Plegas, Yannis and Stamatiou, Yannis C and Elias C. Stavropoulos and Tsakalidis, Athanasios K} } @article {kaporis2001locating, title = {Locating information with uncertainty in fully interconnected networks with applications to World Wide Web information retrieval}, journal = {The Computer Journal}, volume = {44}, number = {4}, year = {2001}, pages = {221{\textendash}229}, author = {Kaporis, Alexis C and Kirousis, Lefteris M and Kranakis, Evangelos and Krizanc, Danny and Stamatiou, Yannis C and Elias C. Stavropoulos} }