Peters C. Multilingual information retrieval: from research to practice / C. Peters, M. Braschler, P. Clough, 2012. - XVII, 217 p. - Текст : непосредственный.
Multilingual information access for text, speech and images : 5th workshop of the cross-language evaluation forum, CLEF 2004 Bath, UK, September 15-17, 2004: revised selected papers / ed. P. Clough, 2005 r=on-line. - Текст : электронный.