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2. L.I. Schiff, Quantum Mechanics, 4th edn. (McGraw Hill Education, New York, 2014)
3. A.S. Davydov, Quantum Mechanics (Pergamon, Oxford, 1965). Moscow, 1973
4. J.J. Sakurai, Modern Quantum Mechanics (Benjamin, New York, 1985)
5. S. Flügge, Practical Quantum Mechanics (Springer, Berlin, 1971)