1. Curie (Ci), a radiation unit named after Marie Curie (1867–1934) who discovered radium; 1 Ci = 3.7•1010 nuclear transformations per second = 3.7•1010 Bq ≈ activity of 1 g of 226Ra.
2. Enge, W.: “Introduction to Plastic Nuclear Track Detectors.” Nuclear Tracks 4, 283, (1980).
3. Yoshihara, K., H. Kudo, T. Sekine: Periodic Table with Nuclides and Reference Data. Springer Verlag, Berlin, (1985).
4. Lederer, C.M, V.S. Shirley (editors): Table of Isotopes, 7th Edition, John Wiley & Sons, Inc., New York, (1978).
5. Brown, E., R.B. Firestone: “Table of Radioactive Isotopes.” V. S. Shirley (Editor), John Wiley, New York, (1986).