Haindl, M., Krupička, M. Non-Iris Occlusions Detection. In: Biometrics: Theory, Applications and Systems (BTAS), 2013. Piscataway: IEEE, 2013, s. 1-6. ISBN 978-1-4799-0527-0. Dostupné z: https://doi.org/10.1109/BTAS.2013.6712729.