Quantitatively, your profile seems good - although your GMAT may be at the edge depending on the schools that you are targeting?
Are your papers in the top journals? How strong are your recommendations?
No, they are not. Not the top journals in Russia.
Recommendations will be strong, really strong as I was the best student of the department, took part in all conferences, etc. But my university is an average Russian one, second-tier.
The question is the following: do I have chances to get into top 50 or not? I'm not aiming for top 25.