How many movies have Janez Vrhovec and Živorad 'Žika' Mitrović collaborated on?

They have worked on 6 movies together! Their first movie together was Echelon of Doctor M (1955) while their highest rated movie together was Doctor Homer's Brother (1968). They have not worked together since Murder Commited in a Sly and Cruel Manner and from Low Motives (1969).