1. Ferraro MM, Casey E, McGrath M (2004) Investigating child exploitation and pornography: the internet, the law and forensic science. Academic, New York
2. Wortley RK, Smallbone S (2006) Child pornography on the internet. US department of justice, Office of community orientated policing services, Washington, DC
3. Tanner JM (1962) Wachstum und Reifung des Menschen. Georg Thieme Verlag, Stuttgart
4. Cattaneo C, Ritz-Timme S, Gabriel P, Gibelli D, Giudici E, Poppa P, Nohrden D, Assmann S, Schmitt R, Grandi M (2009) The difficult issue of age assessment on pedo-pornographic material. Forensic Sci Int 183:e21–e24
5. Rosenbloom AL (2013) Inaccuracy of age assessment from images of postpubescent subjects in cases of alleged child pornography. Int J Legal Med 127:467–471