J. Sousa, G. Farias, V. Freire, and E. da Silva. SUPERLATTICES AND MICROSTRUCTURES, 25 (1-2):
377-381(1999)11th International Conference on Superlattices, Microstructures and
Microdevices (ICSMM-11), HURGADA, EGYPT, JUL 27-31, 1998.
J. de Sousa, J. Freire, V. Freire, and E. da Silva. APPLIED SURFACE SCIENCE, 237 (1-4):
548-552(2004)7th International Symposium on Atomically Controlled Surfaces,
Interfaces and Nanostructures, Nara, JAPAN, NOV 16-20, 2003.