Mound shape instability in multilayer homoepitaxy: The role of corner-crossing F. Buatier de Mongeot, G. Costantini, C. Boragno and U. Valbusa Europhys. Lett., 58 4 (2002) 537-543 Published online: 01 May 2002 DOI: 10.1209/epl/i2002-00429-5