Mendel, Tutorial on higher-order statistics (spectra) in signal
processing and system theory: theorticl results annd some applicaitons,
Proceedigns of IEEE, pp 278-305, March 1991

Athina P. Petropulu, Chrysostomos L. Nikias, Higher-Order Spectra
Analysis : A Nonlinear Signal Processing Framework, Prentice Hall, 1993

G.Cross and A.Jain, "Markov Random Field Texture Models," IEEE Trans
PAMI, 5(1):25-39,1983.

Rama Chellappa, Anil Jain (Editor), Markov Random Fields : Theory and
Application, Academic Press, 1993

Li, S. Z., Markov Random Field Modeling in Computer Vision, Springer,
1995