1. L.E. Ballentine, Am.J. Phys., 54, 883 (1986)
2. 1. J.M. Jauch, Cah. Fund. Scientiae, 27 (1975). Nevertheless, it is well known that the above point of view is not accepted by many specialists. The non-boolean structure of quantum propositions, the alleged inexistence of joint probabilities in Q.M. and the validity of the inequalities of Heisenberg are on the basis of the arguments concerning the inadequacy of the Kolmogorov formalism of proability theory for quantum systems and the need of a more general probability theory. See, e.g.:l) G. Birkhoff, J. von Neumann, Ann. Math., 37, 823 (1946)
3. 2. F.W. Mackey, The Mathematical Foundations of Quantum Mechanics, Harvard Univ. Press, 1960
4. 3. V.S. Varadarajan, Commun. on Pure and Appl. Math., XV, 189 (1962)
5. 4. R.P. Feynman, Proc. Sec. Berkeley Symp. on Math. Stat, and Prob., Berkeley, California, 1951