Y. Jung, J. Yoo, S. Myaeng, и D. Han. Web Information Systems Engineering - WISE 2008, том 5175 из Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2008)
D. Bushnell. New Methods for Survey Research, Proceedings of the International Conference, стр. 23--36. Chilworth Manor, Southampton, Association for Survey Computing, (августа 1998)
K. Drasch, B. Matthes, M. Munz, W. Paulus, и M. Valentin. FDZ-Methodenreport 04/2012, Forschungsdatenzentrum der Bundesagentur für Arbeit im Institut für Arbeitsmarkt- und Berufsforschung, Nuremberg, (2012)
X. Liu, и W. Croft. Proceedings of the 27th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, стр. 186--193. New York, NY, USA, ACM, (2004)