How many movies have Penka Tsitselkova and Petar Slabakov acted in together?

They have worked on 4 movies together! Their first movie together was Four Men in a Boxcar (1970) while their highest rated movie together was Khan Asparukh - Part III - Land Forever (1981). They have not worked together since Khan Asparukh - Part I - Phanagoria (1981). They are most known for their drama films together.