R. Kosara, S. Miksch, H. Hauser:
"Focus and Context Taken Literally";
IEEE Computer Graphics and Applications, 22 (2002), 1; 22 - 29.
http://ieeexplore.ieee.org/iel5/38/21006/00974515.pdf?isNumber=21006&prod=JNL&arnumber=974515&arSt=22&ared=29&arAuthor=Kosara%2C+R.%3B+Miksc