1. Expanding Earth. https://en.wikipedia.org/wiki/Expanding_Earth
2. Accuracy of the International Terrestrial Reference Frame origin and Earth expansion
3. Solar Energy. https://en.wikipedia.org/wiki/Solar_energy
4. David, B. (2009) E = mc2: A Biography of the World’s Most Famous Equation (Illustrated Ed.). Bloomsbury Publishing.
5. Nikolaev, L.A. (1977) Chemistry of Life. The Enlightenment.