Spectroscopy is Applied Quantum Mechanics. Part 3: Introduction to Quantum Mechanics
The article discusses the pioneering work of Erwin Schrödinger on wave mechanics that forms the basis of modern understanding in subatomic behavior. Schrödinger introduced a second-order differential equation that had to be solved to explain the nature of the hydrogen atom. He also demonstrated that the matrix mechanics of Heisenberg and Born were mathematically equivalent and developed the concept of perturbation theory to explain the Stark effect.
Ball, David W., "Spectroscopy is Applied Quantum Mechanics. Part 3: Introduction to Quantum Mechanics" (2008). Chemistry Faculty Publications. 138.