Hi VJ, Its quite a coincident that I was recently in contact with Dr Hardy with regards to his PRASADA project. I will ask him about this topic as well, if he can give some links to his punblications. I will again study a little on this and come out with proper analysis and examples, as otherwise my doubts might not get cleared, if there are any. Till now I was referring Stella Krarisch's works supplemented by Pery Brown and James Fergusson.