Commensurability effects in Andreev antidot billiards J. Eroms, M. Tolkiehn, D. Weiss, U. Rössler, J. De Boeck and G. Borghs Europhys. Lett., 58 4 (2002) 569-575 Published online: 01 May 2002 DOI: 10.1209/epl/i2002-00433-3