On linear forms with coefficients in $\mathbb N\zeta(1+\mathbb N)$. Proceedings of the Session in Analytic Number Theory and Diophantine Equations, 45 pp., Bonner Math. Schriften, 360, Univ. Bonn, Bonn, 2003.
On some systems of Difference equations,
Part 1-10, Max-Plank Institut für Mathematik.
On the asymptotic behavior of solutions of difference equation. Proceedings of the V International Conference "Algebra and Number Theory: Modern Problems and Applications" (Russian) (Tula, 2003). Chebyshevskii Sb. 4 (2003), no. 2(6), 142–153.
