Manolis Koubarakis Yannis Theodoridis Timos K. Sellis Spatio-temporal Databases in the Years Ahead. 345-347 http://dx.doi.org/10.1007/978-3-540-45081-8_9 2003 conf/chorochronos/2003 Spatio-Temporal Databases: The CHOROCHRONOS Approach db/conf/chorochronos/chorochronos2003.html#KoubarakisTS03