S. Miksch, R. Kosara, J. Schrammel, V. Giller, M. Tscheligi, H. Hauser:
"Experimental Evaluation of Semantic Depth of Field, a Preattentive Method for Focus+Context Visualization";
in: "Human Computer Interaction INTERACT'03", IOS Press, Amsterdam, 2003, ISBN: 1586033638.
http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04404630