1. Mathematical Analysis. A Modern Approach to Advanced Calculus;Apostol,1957
2. The Measurement of Time. Time, Frequency and the Atomic Clock;Audoin,2001
3. The Birth of a New Physics;Cohen,1960
4. The Principia: Mathematical Principles of Natural Philosophy;Cohen,1999
5. Apparent evidence of polarization in a beam of β-rays;Cox;Proceedings of the National Academy of Sciences, USA,1928