Read Publication
http://dx.doi.org/10.1590/s0066-782x2008000400007
The following have contributed to this page: Jose Krieger

This shareable PDF can be hosted on any platform or network and is fully compliant with publisher copyright.
http://dx.doi.org/10.1590/s0066-782x2008000400007
The following have contributed to this page: Jose Krieger