Cognitive traveling in digital space of the web and digital libraries : yield of the interdisciplinary multi-partner project TraDiCe - Návrat, Pavol 1952-; Bieliková, Mária 1966-; Laclavík, Michal; Paralič, Ján 1968-; Steinerová, Jela, 1961- (Studies in informatics and information technologies, 2013)