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K. U. Okereafor, C. Onime and O. E. Osuagwu, "Enhancing Biometric Liveness Detection Using Trait Randomization Technique, " 2017 UKSim-AMSS 19th International Conference on Modelling & Simulation, University of Cambridge, Conference Proceedings, pp. 28 — 33, 2017 (http://uksim.info/uksim2017/CD/data/2735a028.pdfАрхивная копия от 8 августа 2017 на Wayback Machine)
K. U. Okereafor, C. Onime and O. E. Osuagwu, "Enhancing Biometric Liveness Detection Using Trait Randomization Technique, " 2017 UKSim-AMSS 19th International Conference on Modelling & Simulation, University of Cambridge, Conference Proceedings, pp. 28 — 33, 2017 (http://uksim.info/uksim2017/CD/data/2735a028.pdfАрхивная копия от 8 августа 2017 на Wayback Machine)