1. A D Arulsamy Ionization Energy Theory: Formalism (Seattle : CreateSpace) (2016)
2. A D Arulsamy Ionization Energy Theory II: Interdisciplinary Science (Seattle : CreateSpace) (2017)
3. W L Bragg Proc. Camb. Phil. Soc. 17 43 (1913)
4. A H Compton Phys. Rev. 21 483 (1923)
5. C V Raman Indian J. Phys. 2 387 (1928)