The provided references in the help menu are not focusing on dual pol classification. Cloud some one let me know the reference paper / journal / article to refer about the implementation of the these two classification algorithms !!!
I think the two dual-pol classifiers are the simple mimic of their corresponding full-pol classifiers. I don’t think there are references for the dual-pol classifiers. You can read the references for the full-pol classifiers in order to understand the algorithms. Here are the references:
 S.R. Cloude and E. Pottier, An entropy based classification scheme for land applications
of polarimetric SAR, IEEE Transactions on Geoscience and Remote Sensing, 35(1),
68 78, January 1997.
 J.S. Lee, M.R. Grunes, T.L. Ainsworth, L.J., Du, D.L.Schuler, and S.R. Cloude, Unsuper
vised classification using polarimetric decomposition and the complex Wishart
classifier, IEEE Transactions on Geoscience and Remote Sensing, 37(5), 2249 2258,