1. R. Stritet and A. S. Whiteman, RST, Spin, Statistics, etc. [Russian translation], Nauka., Moscow (1966).
2. Yu. M. Berezanskii, Integral representation of positive definite Whiteman functionals, Ukrainsk. Matem. Zh.,19, No. 1 (1967).
3. K. Maurin, Mathematical Structure of Whiteman Formulation of Quantum Field Theory, Bull. Acad. Polon. Sci., Ser. Sci. Math., Astr. et Phys.,11, 119 (1963).
4. I. M. Gel'fand and N. Ya. Vilenkii, Generalized Functions. Some Applications of Harmonic Analysis. Equipped Hilbert Spaces [in Russian], No.4, Fizmatgiz, Moscow (1961).
5. Yu. M. Berezanskii, Expansion of Self-Conjugate Operators in Eigen Functions [in Russian], Naukova Dumka, Kiev (1965).