1. Application of duality method to a solution of nonlinear problem of filtration theory with limit gradient;Badriev;Differents. Uravn.,1982
2. I.B.Badriev, M.M.Karchevskii, On the convergence of iteration processes in Banach spaces, Issledovaniya Po Prikladnoi Matematike (Investigations in Applied Mathematics), Kazan 17 (1990), 3–15.
3. Investigating one dimensional equation of the soft shell statistical condition and algorithm of their solution;Badriev;Izv. Vyssh. Uchebn. Zaved. Matematika,1992
4. Investigation of the convergence of iterative process for equations with degenerate operators;Badriev;Differents. Uravn.,1996
5. I.B. Badriev, O.A. Zadvornov, On the convergence of iterative process for solving variational inequality of the second kind, Issledovaniya Po Prikladnoi Matematike (Investigations in Applied Mathematics), Kazan 22 (1997), 5–17.