Manolis Tzagarakis Michalis Vaitis Athanasios Papadopoulos Dimitris Christodoulakis The Callimachus Approach to Distributed Hypermedia. 47-48 HT1999/P047.pdf 1999 conf/ht/99 Hypertext http://doi.acm.org/10.1145/294469.294482 db/conf/ht/ht99.html#TzagarakisVPC99