https://www.google.com/url?sa=t&source=web&rct=j&url=http://www.portalintercom.org.br/anais/sudeste2014/resumos/R43-1169-2.pdf&ved=2ahUKEwiB6o6C7p_qAhUFGbkGHRRODowQFjACegQIBBAB&usg=AOvVaw0W4nv58FywUmwNvOInKblN