1. Norway, and Boon Kee. 2001. Low Face Detection: A Survey, April 17, 2001.
2. Gupta, Varsha, and Dipesh Sharma. 2014. A Study of Various Face Detection Methods. IJARCCE 3 (5).
3. Lu, Yongzhong, Jingli Zhou, and Shengsheng Yu. 2003. A Survey of Face Detection, Extraction and Recognition, vol. 22. University of Science and Technology Computing and Informatics.
4. Bakshi, Urvashi, and Rohit Singhal. 2014. A Survey on Face Detection Methods and Feature Extraction Techniques.
5. Niyomugabo, Cesar, Kwon Jae Hong, and Tae Yong Kim. 2014. A Fast Face Detection Method Based On Skin Color and Adaboost. IEEE ISCE.