by Runde, M., Aurud, T., Lundgaard, L.E., Ottesen, G.E., Faugstad, K.
Published in IEEE transactions on power delivery (01.07.1992)

by Runde, M., Aurud, T., Ljokelsoy, K., Lundgaard, L.E., Nokleby, J.E., Skyberg, B.
Published in IEEE transactions on power delivery (01.04.1997)

by Runde, M., Aurud, T., Nokleby, J.E., Skyberg, B., Ljokelsoy, K., Lundgaard, L.E.
Published in Proceedings of 1996 Transmission and Distribution Conference and Exposition (1996)