1. Jain, A.K., Ross, A., Prabhakar, S.: An introduction to biometric recognition. IEEE Trans. Circuits Syst. Video Technol. 14(1), 4–20 (2004)
2. Emersic, Z., Struc, V., Peer, P.: Ear recognition: more than a survey. Neurocomputing 255(Suppl. C), 26–39 (2017). Bioinspired intelligence for machine learning
3. Iannarelli, A.V.: Ear Identification. Forensic Identification Series. Paramont Publishing Company (1989)
4. Burge, M., Burger, W.: Ear biometrics, pp. 273–285. Springer, Boston (1996)
5. Moreno, B., Sanchez, A., Velez, J.F.: On the use of outer ear images for personal identification in security applications. In: Proceedings IEEE 33rd Annual 1999 International Carnahan Conference on Security Technology (Cat. No. 99CH36303), pp. 469–476 (1999)