1. M. Jammer, The Philosophical Foundations of Quantum Theory (J. Wiley & Sons, New York, 1974).
2. L. E. Ballentine, The statistical interpretation of quantum mechanics, Rev. Mod. Phys. 42(4), 358–381 (1970).
3. A. D. Alexandrov, On the meaning of the wave function (in Russian), Doklady Akademii Nauk SSSR 85, 292–294 (1952)
4. G. J. Mjakishev, What is the cause of the statistical character of quantum mechanics (in Russian), Voprossy Filosofii 6, 146–159 (1954).
5. C. Monroe et al, A “Schrödinger cat” superposition state of an atom, Science 272, 1131–1136 (1996).