RCQ-ACS: RDF Chain Query Optimization Using an Ant Colony System. - Alexander Hogenboom; Ewout Niewenhuijse; Frederik Hogenboom; Flavius Frasincar (Web Intelligence, 2012)

RDF chain query optimization in a distributed environment. - Alexander Hogenboom; Ewout Niewenhuijse; Milan Jansen; Flavius Frasincar; Damir Vandic (SAC, 2015)