Board Chairman of national joint-stock company Naftogaz Ukrainy Andriy Kobolev and Head of Russia's OJSC Gazprom Alexei Miller agreed to continue the discussion of details and conditions of supplies of natural gas next week, the press service of Naftogaz Ukrainy has told Interfax-Ukraine.

The press service said that at a meeting of the heads of the two companies held in Vienna on Wednesday the key parameters of the winter package were discussed.

"At the today's meeting we discussed the key parameters of the new trilateral agreement. The constructive approach of Russia should be pointed out. It allowed approaching the positions on some substantial issues," the press service said, citing Kobolev.