WHAT DOES A PEN CARRY? ARE YOU AWARE?. International Journal of Biomedical Research, [S. l.], v. 2, n. 6, p. 346–352, 2011. DOI: 10.7439/ijbr.v2i6.122. Disponível em: https://ssjournals.co.in/index.php/ijbr/article/view/668. Acesso em: 20 apr. 2026.