1. Department of Environment Sciences Forest Institute, Federal Rural University of Rio de Janeiro, Seropédica Rio de Janeiro Brazil
2. Physics Department Federal University of Mato Grosso do Sul Campo Grande Brazil
3. Department of Applied Mathematics Faculty of Mechanical Engineering University of Žilina Univerzitná 1 Žilina Slovakia
4. Department of Forestry and Wood Sciences Federal University of Espírito Santo, Jerônimo Monteiro Espírito Santo Brazil