S. Doerfel, D. Zoller, P. Singer, T. Niebler, A. Hotho, и M. Strohmaier. Proceedings of the 16th LWA Workshops: KDML, IR and FGWM, Aachen, Germany, September 8-10, 2014., том 1226 из CEUR Workshop Proceedings, стр. 18--19. CEUR-WS.org, (2014)
S. Doerfel, D. Zoller, P. Singer, T. Niebler, A. Hotho, и M. Strohmaier. Proceedings of the 16th LWA Workshops: KDML, IR and FGWM, Aachen, Germany, September 8-10, 2014., том 1226 из CEUR Workshop Proceedings, стр. 18--19. CEUR-WS.org, (2014)