@inproceedings{thuemmel2021facial,
	doi = {10.1109/IWBF50991.2021.9465080},
	pages = {1-6},
	year = {2021},
	booktitle = {IEEE International Workshop on Biometrics and Forensics (IWBF)},
	author = {Martin Thümmel and Sven Sickert and Joachim Denzler},
	title = {Facial Behavior Analysis using 4D Curvature Statistics for Presentation Attack Detection},
}