Nikos Karousos Manolis Tzagarakis Ippokratis Pandis Increasing the usage of open hypermedia systems: a developer-side approach. 148-149 2003 conf/ht/2003 Hypertext http://doi.acm.org/10.1145/900051.900083 db/conf/ht/ht2003.html#KarousosTP03