[1] DRISCH T.: Generalization of Gleason's theorem. Inter. J. Theor, Phys., 18, 1978, 4, 239-243. MR 0552434

[2] DVUREČENSKIJ A.: On m-joint distribution. Math. Slovaca, 31, 1981, 4, 347-353. MR 0637963 | Zbl 0474.03033

[3] DVUREČENSKIJ A., PULMANNOVA S.: On joint distributions of observables. Math. Slovaca, 32, 1982, 2, 155-166. MR 0658249 | Zbl 0495.60007

[4] DVUREČENSKIJ A., PULMANNOVA S.: Connection between joint distribution and compatibility. Reports. Math. Phys., 18, 1980, 3. MR 0740835

[5] EILERS M., HORST E.: The theorem of Gleason for nonseparable Hilbert spaces. Inter. J. Theor. Phys., 13, 1975, 6, 419-424. MR 0389054

[6] GREECHIE R.: On generating distributive sublattices of orthomodular lattices. Proc. Amer. Math. Soc., 67, 1977, 1, 17-22. MR 0450157 | Zbl 0371.06008

[7] GUDDER S. P.: Uniqueness and existence properties of unbounded observables. Pac. J. Math., 19, 1966, 1, 81-93. MR 0201146

[8] GUDDER S. P.: Hilbert space, independence and generalized probability. J. Math. Anal. Appl., 20, 1967, 1, 48-61. MR 0222924

[9] GUDDER S. P.: Joint distributions of observables. J. Math, and Mech., 18, 1968, 4, 325-335. MR 0232582 | Zbl 0241.60092

[10] GUDDER S. P.: Some unsolved problems in quantum logics. in: Mathematical foundations of quantum theory. A. R. Marlow, ed., p. 87-103, Academic Press, NY. 1978. MR 0495813

[11] PULMANNOVÁ S.: Compatibility and partial compatibility in quantum logics. Ann. Inst. Henri Poincare, 34, 1981, 4, 391-403. MR 0625170

[12] PULMANNOVÁ S., DVUREČENSKIJ A.: Uncertainty principle and jointsdistributions of observables. Ann. Inst. Henri Poincaré, 42, 1985, 3, 253-265. MR 0797275

[13] PTÁK P.: Spaces of observables. Czech. Math. J., 34 (109), 1984, 552-561. MR 0764437 | Zbl 0572.28007

[14] SCHATTEN R.: Norm ideals of completely continuous operators. 2nd ed. Springer Verlag 1970. MR 0257800 | Zbl 0188.44103

[15] URBANIK K.: Joint distributions of observables in quantum mechanics. Stud. Math., 21, 1961, 117-131. MR 0154558

[16] VARADARAJAN V. S.: Geometry of quantum theory. Vol. 1., Van Nostrand, Princeton NY. 1968. MR 0471674