1. The generalized heat flow equation and a corresponding Poisson formula;Cameron;Annals of Math.,1954
2. On certain limit theorems of the theory of Probability;Erdös;Bull. Amer. Math. Soc.,1946
3. Space-time approach to non-relativistic quantum mechanics;Feynman;Reviews of Modern Physics,1948
4. Integration in function space and its application in quantum physics;Gelfand;Uspekhi Mat. Nauk,1956