Russia and Ukraine expressed hope that energy disputes between the two former Soviet republics were being resolved.
Prime Ministers of both the countries met in Moscow Wednesday.
Ukrainian Prime Minister Yulia Tymoshenko told her Russian counterpart Vladimir Putin that "It is good that our cooperation is being fine-tuned" after a confrontation earlier this year.
Russia halted all gas shipments to Europe via Ukraine in January, over a pricing dispute.
The steep drop in gas supplies caused fuel crisis in European countries in the height of winter.
Tymoshenko said the system of gas supplies in Ukraine has fully stabilized.
She offered Kiev's help to Moscow in establishing an international center for uranium enrichment, a joint project by Kazakhstan and Russia to supply other countries with enriched uranium for civilian nuclear purposes.
Putin pointed out that many issues, including "violations" of the rights of Russian entrepreneurs in Ukraine, remained unresolved.
However, he expressed happiness in the strengthened cooperation between "certain rather sensitive and important industries and enterprises" of the two countries.
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