الإتاحة: https://doi.org/10.1590/S1806-37132009000600007Testhttp://hdl.handle.net/11449/11548Test
الإتاحة: https://doi.org/10.1590/S0034-70942003000600011Testhttp://hdl.handle.net/11449/10985Test
الإتاحة: https://doi.org/10.1590/S0102-35862002000500003Testhttp://hdl.handle.net/11449/211363Test
الإتاحة: https://doi.org/10.3109/0886022X.2013.876353Testhttp://hdl.handle.net/11449/112187Test
الإتاحة: https://doi.org/10.3109/0886022x.2013.876353Test
الإتاحة: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-70942003000600011Test