Charles R. Tolle Timothy R. McJunkin David J. Gorisch Suboptimal Minimum Cluster Volume Cover-Based Method for Measuring Fractal Dimension. 32-41 2003 25 IEEE Trans. Pattern Anal. Mach. Intell. 1 http://computer.org/tpami/tp2003/i0032abs.htm db/journals/pami/pami25.html#TolleMG03