P. Huntington, D. Nicholas, и H. Jamali. Information Processing & Management, 44 (1):
358 - 372(2008)Evaluation of Interactive Information Retrieval Systems.
T. Wilson, J. Wiebe, и P. Hoffmann. Proceedings of the Human Language Technology Conference and the Conference
on Empirical Methods in Natural Language Processing (HLT/EMNLP), стр. 347--354. (2005)