1. A. B. Antonevich, Linear Functional Equations. Operator Approach [in Russian], Universitetskoe, Minsk (1988).
2. A. Antonevich, M. Belousov, and A. Lebedev, Functional Differential Equations II. C * -applications. Parts 1, 2, Longman, Harlow (1998).
3. A. Antonevich and A. Lebedev, Functional Differential Equations. I. C * -Theory, Longman, Harlow (1994).
4. M. F. Atiyah and I.M. Singer, “The index of elliptic operators III,” Ann. Math. (2), 87, 546–604 (1968).
5. A. Connes, “C * algèbres et géométrie différentielle,” C. R. Math. Acad. Sci. Paris, 290, No. 13, A599–A604 (1980).