, B.J. (2004) The use of query operators and their effect on the results of Web search engines, In Issues of Human Computer Interaction. Editor: Dr. Anabela Sarmento. p. 50-72. Hershey, PA: Idea Group Publishing. Refereed Journal Articles Mukherjee, P. and Jansen, B.J. (2017) Conversing and Searching: The Causa