How many movies have Nikolai Bogolyubov and Pyotr Shcherbakov acted in together?

They have worked on 4 movies together! Their first movie together was Страницы былого (1958) while their highest rated movie together was Liberation: The Fire Bulge (1970). They have not worked together since Liberation: Direction of the Main Blow (1970). They are most known for their drama films together.