IEEE Transactions on Systems, Man & Cybernetics: Part B. Dec2009, Vol. 39 Issue 6, p1362-1381. 20p. 4 Black and White Photographs, 11 Charts, 12 Graphs.
IEEE Transactions on Knowledge & Data Engineering. Jul2008, Vol. 20 Issue 7, p956-964. 9p. 3 Black and White Photographs, 1 Diagram, 3 Charts, 9 Graphs.