Z. Pizlo, E. Stefanov, J. Saalweachter, Y. Haxhimusa, W. Kropatsch:
"Traveling Salesman Problem: A Foveating Pyramid Model";
The Journal of Problem Solving, 1 (2006), 1; 83 - 101.
http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC06587031