How many movies have Carmen G. Cervera and Manuel Rojas collaborated on?

They have worked on 3 movies together! Their first movie together was Hay que educar a papá (1971) while their highest rated movie together was ¡Vaya par de gemelos! (1978). They have not worked together since ¡Vaya par de gemelos! (1978). They are most known for their comedy films together.