F. Potiguar, и U. Costa. PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 342 (1-2):
145-150(2004)8th Latin American Workshop on Nonlinear Phenomena, Salvador, BRAZIL,
SEP 28-OCT 03, 2003.
T. Pereira, M. Bezerra, J. Freire, V. Freire, и G. Farias. BRAZILIAN JOURNAL OF PHYSICS, 36 (2A):
347-349(2006)12th Brazilian Workshop on Semiconductor Physics (BWSP-12), Sao Jode dos
Campos, BRAZIL, APR 04-08, 2005.