1. O. G. Smolyanov and E. T. Shavgulidze, Continual Integrals, 2nd ed. (URSS, Moscow, 2015) [in Russian].
2. L. Diosi, Phys. Lett. A 129, 419–423 (1988).
3. S. Albeverio, V. N. Kolokol’tsov, and O. G. Smolyanov, C. R. Acad. Sci. Paris. Sér. 1 323, 661–664 (1996).
4. S. Albeverio, V. N. Kolokol’tsov, and O. G. Smolyanov, Rev. Math. Phys. 9 6, 907–920 (1997).
5. V. P. Belavkin and O. G. Smolyanov, Dokl. Math. 57 3, 430–434 (1998).