Orbit sums and modular vector invariants, in "Diophantine Approximation" , Festschrift for Wolfgang Schmidt ( Eds: H.P. Schlickewei, K. Schmidt,
R. F. Tichy), Springer-Verlag, Wien-New York, 2008, pp. 381-412.
Orbit sums method in the theory of modular vector invariants, International Scientific Conference "Diophantine and Analytic Problems in Number Theory"
(dedicated to the 100th birthday of A.O. Gelfond), Moscow, Russia, 2007, pp. 32-33.