1. P.Curie and A.Laborde, Comptes Rendu Acad. Sci. 136:673(1903).
2. C.S.Wu, “History of Beta Decay” North Holland Publishing Co., Amsterdam, (1960).
3. R Kelley, J. Low Temp. Phys.:93(1993)
4. B. Cabrera et al., Phys. Rev. Lett. 55:25(1985).
5. K.Pretzl et al.(eds.), “Low-Temperature Detectors for Neutrinos and Dark Matter” Springer Verlag, Berlin (1987).