1. R.P. FEYNMAN, Space-Time Approach to Non-Relativistic Quantum Mechanics, Rev. Mod. Phys. 20, 367–337 (1948).
2. Lecture Notes in Mathematics;S. Albeverio,1976
3. S. ALBEVERIO, Mathematical Theory of Feynman Path Integrals, Acta Univ. Wratisl. 368 (1976), XIIth Winter School of Theoretical Physics in Karpacz (1975).
4. P.A.M. DIRAC, The Lagrangian in Quantum Mechanics, Phys. Zeitschr. d. Sovyetunion 3, no 1, 64–72 (1933). See also the references in [2], [3].
5. M. KAC, On a Distribution of Certain Wiener Functionals, Trans. Am. Math. Soc, 65, 1–13 (1949).