Nevertheless, even this growth rate may lead to a serious deterioration in the terms of trade for Eastern Europe and may demand greater Soviet financial assistance in default of higher Soviet subsidies and a recycling of petrorubles earned from the export of oil, perhaps in the form of low interest rate trade credits.
Source: wiktionary
The petroruble euphoria is a thing of the past. Yet food imports have increased and continue to be used to "patch" the holes in the country's domestic market. They account for about 20 percent of all Soviet imports, an exceptional figure.
Source: wiktionary
If Sechin decides to sell this Iranian oil for rubles, through a Russian exchange, such a move will boost the chances of the 'petroruble' and will hurt the petrodollar.
Source: wiktionary
and even that the Putin government in Moscow was mulling the idea of introducing aspecific oil-trading currency tentatively dubbed the "petroruble."
Source: wiktionary