I am trying to find the aforementioned paper online but have had no luck.
I originally spotted it as a reference [26] for the paper Gauss, Landen, Ramanujan, the Arithmetic-Geometric Mean, Ellipses, π, and the Ladies Diary (p 607) where it is fully referred to as:
L. Jacobsen and H. Waadeland, Glimt fra analytisk teori for kjedebrøker, Del II, Nordisk Mat. Tidskr., 33 (1985) 168-175.
Problem solved – see the comments. I am posting this answer in order to remove the question from the list of unanswered questions.