Antonio Carlos Caetano de Souza
São Paulo State University (UNESP) - Campus Guaratinguetá - Energy Department
Av. Ariberto Pereira da Cunha, 333
12516-410, Guaratinguetá - SP - Brazil
Tel: (55)-12-3123-2800 (ramal 1903) - Fax: (55)-12-3123-2835
e-mail: iwhfc@feg.unesp.br
The additional findings are available at: www.feg.unesp.br/iwhfc