T. McCabe. Proceedings of the 2nd international conference on Software engineering, page 407--. Los Alamitos, CA, USA, IEEE Computer Society Press, (1976)ACM ID: 807712.
S. Khan, and M. Shah. Computer Vision and Pattern Recognition, 2001. CVPR 2001. Proceedings
of the 2001 IEEE Computer Society Conf. on, 2, page II--746 -- II--751 vol.2. (2001)