Expository articles, lecture notes, open problems

Tilings and Dynamics , Preprint, 51 pp., Lecture Notes, EMS Summer School on Combinatorics, Automata and Number Theory, 8-19 May 2006, Liege.

Notes on Bernoulli convolutions , Proc. Symp. in Pure Math. 72.1 (2004), 207--230, American Mathematical Society.

Fractals in the plane with positive length and zero Buffon needle probability: an exposition (with Yuval Peres and Karoly Simon), Amer. Math. Monthly 110 (2003), 314-325.

Problems on self-similar sets and self-affine sets: an update (with Yuval Peres) , Fractals and Stochastics II, Proc. of the U. of Greifswald 1998 conference, (C. Bandt, S. Graf and M. Zaehle, eds.), Progress in Probability 46, 95-106, Birkhauser, 2000.