How many movies have Birger Österberg and Maj Sjöwall collaborated on?

They have worked on 3 movies together! Their first movie together was Brandbilen som försvann (1993) while their highest rated movie together was Die Tote im Goeta-Kanal (Roseanna) (1993). They have not worked together since Polis polis potatismos (1993). They are most known for their thriller films together.