1. 1. Iannarelli, A. V.; Iannarelli system of ear identification, Foundation Press, Brooklyn, NY, 1989.
2. 2. Meijerman, L., Thean, A., Maat, G.; Earprints in forensic investigations, Forensic Sci. Med. Pathol., 1, pp.247-256, 2005.
3. 3. Abaza, A., Ross, A., Hebert, C., Harrison, M. A.F., Nixon, M.; A Survey on Ear Biometrics. ACM Trans. Embed. Comput. Syst., 9, pp.39:1-39:31, 2010.
4. 4. Barra, S., Marsico, M. D., Nappi, M., Riccio, D.; Unconstrained Ear Processing: What is Possible and What Must Be Done, In: Signal and Image Processing for Biometrics, pp.129-190, 2014.
5. 5. Pflug, A., Busch, C.; Ear biometrics: a survey of detection, feature extraction and recognition methods, IET Biometrics, 1(2), pp.114-129, 2012.