Possibly you are referring to Lars Oyane. He continues to do research on Luster County (Norway) families. He has already published 5 volumes from these church areas: Fortun (Vol.1), Dale 1 (Vol.2), Dale 2 and Nes (Vol.3), Gaupne (Vol.4) and Jostedal (Vol.5. Judy Gates, 416 Pine St., Viroqua, WI., 54665 USA, phone: (+1) 608-637-3805 will advise you how to get more information or buy these unique bygdebooks.
My Aabergs are from the Bollingberg farm in Vol. 4. Let me know if I can be of more help.
Sue