TITJUR Karella and Karellas Opinion of Mr Advocate General Tesauro delivered on 30 January 1991. # Marina Karella and Nicolas Karellas v Minister for Industry, Energy and Technology and Organismos Anasygkrotiseos Epicheiriseon AE. # References for a preliminary ruling: Symvoulio Epikrateias - Greece. # Company law - Directive - Direct effect - Primacy. # Joined cases C-19/90 and C-20/90.