7G. McLachlan and T.Krishnan, The EM Algorithm and Extensions. New York: wiley Interscience, 1997.
8F.Pia, "Reflection on lifeguarding surveillance programs," Reflection on Lifeguarding Conf., 1994.
9Wenmiao Lu,Yap-Peng Tan,"A camera-based system for early detection of drowning incidents",Image Processing. 2002. Proceedings. 2002 International Conference on, Volume:3, 24-28 June 2002.
10D. Comaniciu and P. Meer," Mean shift analysis and applications," in Proc.Int. Conf. Computer Vision, vol. 2, 1999. pp. 1197-1203.