While some European companies keep purchasing gas from Russia, others decided to step back in fear of violating the EU's sanctions law. Who is right? Interviewed by Tagesschau, finance professor at HEC Paris Business School Armin Steinbach thinks that "the arguments of GasTerra, Shell and Ørsted are valid. These companies are rightly refusing to open a ruble-denominated account with Gazprombank, as Putin has ordered by decree."