1. Van Trees, H.,Detection, Estimation and Modulation Theory, John Wiley and Sons, New York, 1968.
2. Baggeroer, A.,State Variables and Communication Theory, MIT Press, Cambridge, Massachusetts, 1970.
3. Selin, I.,Detection Theory, Princeton University Press, Princeton, New Jersey, 1965.
4. Courant, R., andHilbert, D.,Methods of Mathematical Physics, John Wiley and Sons (Interscience Publishers), New York, 1966.
5. Tricomi, F.,Integral Equations, John Wiley and Sons (Interscience Publishers), New York, 1957.