FLORENCE, Darlene C.; HARRALSON, Heidi H.; BARABE, Joseph G. An Introduction to Gel Inks: History and Analysis. Journal of Forensic Document Examination, [S. l.], v. 28, p. 105–124, 2019. DOI: 10.31974/jfde28-105-124. Disponível em: https://jfde.org/index.php/jfde/article/view/263. Acesso em: 25 apr. 2024.