Veruska Zamborlini Giancarlo Guizzardi On the Representation of Temporally Changing Information in OWL. 283-292 2010 EDOCW http://doi.ieeecomputersociety.org/10.1109/EDOCW.2010.50 conf/edoc/2010w db/conf/edoc/edoc2010w.html#ZamborliniG10