Ukraine's European integration will seriously affect the trade turnover between Ukraine and Russia. Consequences will come for both sides, although it is obvious that Kiev will suffer most. But there are other aspects of previous agreements that the leaderships of the two countries will have to overcome urgently. It was hard to imagine before that someday Ukraine and Russia will be on opposite sides. For example, the heavy industry in Russia is still seriously tied to the products supplied from the former Soviet Union. This can be a challenge.

Mikhail Voeikov, the head of the Center of Political Economy

"In general, I do not think that Russia is somehow economically threatened. The only big problem here is that a lot of engineering products for the Russian industry are produced in Ukraine, because business ties in this area are now uncertain.A lot of spare parts for missiles, for many machines have been made ​​in Ukraine since Soviet times. This is perhaps the biggest problem, because Russia will try to make everything independently, but this is not easy, and can not be done quickly."