1. Discovery of the Elements;WEEKS,1956
2. Beryllium and berylliosis;SCHUBERT,1973
3. K. K. TUREKIAN, Elements, geochemical distribution of, McGraw Hill Encyclopedia of Science and Technology, Vol. 4, pp. 627–30, 1977.
4. A new kind of natural radioactivity
5. Industrial Inorganic Chemistry;BÜCHNER,1989