1. N. V. Azbelev, ?On some trends in generalizations of the differential equation,? Differents. Uravn.,21, No. 8, 1291?1304 (1985).
2. N. V. Azbelev and V. P. Maksimov, ?A priori estimates of solutions of the Cauchy problem and solvability of boundary-value problems for equations with retarded argument,? Differents. Uravn.,15, No. 10, 1731?1747 (1979).
3. N. V. Azbelev and V. P. Maksimov, ?Equations with retarded argument,? Differents. Uravn.,18, No. 12, 2027?2050 (1982).
4. N. V. Azbelev and L. F. Rakhmatullina, ?Functional-differential equations,? Differents. Uravn.,14, No. 5, 771?797 (1978).
5. M. T. Ashordiya, ?On a many-point boundary-value problem for a system of generalized ordinary differential equations,? Soobshch. Akad. Nauk Gruz. SSR,115, No. 1, 17?20 (1984).