U. O'Reilly. IEEE International Conference on Systems, Man, and
Cybernetics, Computational Cybernetics and Simulation, 5, page 4092--4097. Orlando, Florida, USA, (12-15 October 1997)
R. Kawase, G. Papadakis, E. Herder, and W. Nejdl. Proc. of 22nd ACM conference on Hyptertext and Hypermedia (HT), June 2011, Eindhoven, The Netherlands., (2011)
C. Danescu-Niculescu-Mizil, R. West, D. Jurafsky, J. Leskovec, and C. Potts. Proceedings of the 22nd international conference on World Wide Web, page 307--318. Republic and Canton of Geneva, Switzerland, International World Wide Web Conferences Steering Committee, (2013)