[GRASS5] Further information about classification algorithms

Hi all,
I'd like to get some more information about the clustering, maximum likelihood and maximum a posteriori algorithms used by GRASS. Documentation on commands reports (i.cluster; i.maxlik, i.smap) is not enough for my purposes.
How can i get this info??
Thank you very much!

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Carlos Isorna Suárez
isorna@ctm.ulpgc.es Tfno: +34 928 452956 Fax:+34 928 451243
Centro de Tecnología Médica http://www.ctm.ulpgc.es
Universidad de Las Palmas de G.C. - Spain