Search for: [Subject = Physics] OR [Subject = Quantum mechanics, field theories, and special relativity] OR [Subject = Electromagnetism\; electron and ion optics] OR [Title = Invariant Solution of Dirac Equation in Crossed Electric and Magnetic Fields. Spin Integral of Motion. \(H < E\)] OR [Creator = R. G. Petrosyan] OR [Creator = M. A. Davtyan]