Reilly, P. (1 January 2008). "'Googling' Terrorists: Are Northern Irish Terrorists Visible on Internet Search Engines?". In Spink, Prof Dr Amanda; Zimmer, Michael (eds.). Web Search. Information Science and Knowledge Management. Vol. 14. Springer Berlin Heidelberg. pp. 151–175. Bibcode:2008wsis.book..151R. doi:10.1007/978-3-540-75829-7_10. ISBN978-3-540-75828-0. S2CID84831583.
Reilly, P. (1 January 2008). "'Googling' Terrorists: Are Northern Irish Terrorists Visible on Internet Search Engines?". In Spink, Prof Dr Amanda; Zimmer, Michael (eds.). Web Search. Information Science and Knowledge Management. Vol. 14. Springer Berlin Heidelberg. pp. 151–175. Bibcode:2008wsis.book..151R. doi:10.1007/978-3-540-75829-7_10. ISBN978-3-540-75828-0. S2CID84831583.
Reilly, P. (1 January 2008). "'Googling' Terrorists: Are Northern Irish Terrorists Visible on Internet Search Engines?". In Spink, Prof Dr Amanda; Zimmer, Michael (eds.). Web Search. Information Science and Knowledge Management. Vol. 14. Springer Berlin Heidelberg. pp. 151–175. Bibcode:2008wsis.book..151R. doi:10.1007/978-3-540-75829-7_10. ISBN978-3-540-75828-0. S2CID84831583.
Heymann, Paul; Koutrika, Georgia; Garcia-Molina, Hector (12 February 2008). "Can Social Bookmarking Improve Web Search?". First ACM International Conference on Web Search and Data Mining. Retrieved 12 March 2008.