Ruddle, RA Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society;
https://eprints.whiterose.ac.uk/8631/2/RoyRuddle2.pdf (Any fulltext)
Ruddle, R. (2009). Finding information again using an individual’s web history. In WebSci'09: Society On-Line.