1. I. Abdullaev, ?Elliptic curves and the representation of numbers by quaternary quadratic forms,? Dokl. Akad. Nauk Uzb. SSR, No. 1, 3?4 (1973).
2. I. Abdullaev, ?Formulas of Weil-Eichler type for the number of representations of any natural numbers by quadratic forms with four and six variables,? Izv. Akad. Nauk Uzb.SSR, Ser. Fiz.-Mat. Nauk, No. 3, 3?10 (1976).
3. I. Abdullaev and L. A. Kogan, ?Elliptic curves and the representation of numbers by positive quadratic forms,? Dokl. Akad. Nauk Uzb. SSR, No. 6, 3?4 (1971).
4. I. Abdullaev and L. A. Kogan, ?Elliptic curves and the representation of numbers by positive definite quadratic forms with four and six variables,? Vestn. Karakalp. Fil. Akad. Nauk Uzb. SSR, No. 4 (54), 15?18 (1973).
5. I. Abdullaev and L. A. Kogan, ?Elliptic curves and the representation of numbers by positive quadratic forms with six variables,? Tr. Tashk. Politekh. Inst., No. 130, 17?22 (1974).