1. Ross AA, Nandakumar K, Jain AK. Handbook of Multibiometrics. Boston, MA, USA: Kluwer; 2006
2. Travieso CM, del Pozo-Baños M, Alonso JB. Fused intra-bimodal face verification approach based on scale-invariant feature transform and a vocabulary tree. Pattern Recognition Letters;36:254-260
3. Travieso CM, Zhang J, Miller P, Alonso JB, Ferrer MA. Bimodal biometric verification based on face and lips. Neurocomputing;74(14–15):2407-2410
4. Ross A. An introduction to multibiometrics. In: Proceedings of the 15th European Signal Processing Conference; 2007. pp. 20-24
5. Long TB, Thai LH, Hanh T. Multimodal biometric person authentication using fingerprint, face features. In: Anthony P, Ishizuka M, Lukose D, editors. Trends in Artificial Intelligence (LNCS 7458). Springer; 2012. pp. 613-624