References
T. Yang, Q. Pan, S. .Li, J. Li, "Multiple Layer Based Background Maintenance In Complex Environment", International Conference on Image and Graphics, ICIG 2004, Hong Kong, China, December 2004.
F. Porikli, O. Tuzel, "Bayesian background modeling for foreground detection", ACM International Workshop on Video Surveillance and Sensor Networks, VSSN 2005, pages 55–58, November 2005.