A fractal dimension estimate for a graph-directed iterated function system of non-similarities G. EdgarJeffrey Golds 28A8037F35fractalHausdorff dimensionbox-counting dimensionspectral radiusself-similariterated Indiana University Mathematics Journal 1999 text pdf 10.1512/iumj.1999.48.1641 10.1512/iumj.1999.48.1641 en Indiana Univ. Math. J. 48 (1999) 429 - 448 state-of-the-art mathematics http://iumj.org/access/