Guilherme C. de Oliveira
and Agnaldo R. de Almeida
and Iara P. de Queir{\'o}s
and Arthur M. Moraes
and C{\'e}lia M. A. DantasPhysica A: Statistical Mechanics and its Applications351
251--259
(2005)
Jonas da Costa Carvalho
and Gerv{\'a}sio Annes Degrazia
and Marco T{\'u}lio de Vilhena
and Sergio Garcia Magalh{\~a}es
and Antonio G. Goulart
and Domenico Anfossi
and Ot{\'a}vio Costa Acevedo
and Osvaldo L. L. MoraesPhysica A: Statistical Mechanics and its Applications368
247--256
(2006)