1. Albeverio, S., Höegh-Krohn, R.,[1] Mathematical theory of Feynman path integrals, Springer, 1976. (Lecture notes in math. 523.)
2. Alimov, A.L.,[1] Zap. Nauchn. Sem. LOMI 42 (1974), 6–11. (In Russian.)
3. Alimov, A.L., Buslaev, V.S.,[1] Vestnik LGU, Mat. 1 (1972), 5–14. (In Russian.)
4. Averbukh, V.L, [1] Uspekhi Mat. Nauk 22: 3 (1967), 233–234. (In Russian.)
5. Averbukh, V.L, Smolyanov, O.G., [1] Uspekhi Mat. Nauk 22: 6 (1967), 201–260. (In Russian.)