Evangelos Bampas Leszek Gasieniec Nicolas Hanusse David Ilcinkas Ralf Klasing Adrian Kosowski Euler Tour Lock-In Problem in the Rotor-Router Model. 423-435 2009 DISC http://dx.doi.org/10.1007/978-3-642-04355-0_44 conf/wdag/2009 db/conf/wdag/disc2009.html#BampasGHIKK09