by Talmage, G., Mazumder, S., Brown, S.H., Sondergaard, N.A.
Published in IEEE transactions on energy conversion (01.12.1995)

by Young, F.J., Brown, S.H., Sondergaard, N.A.
Published in IEEE transactions on magnetics (01.01.1989)

by Kuhlmann-Wilsdorf, D., Makel, D.D., Sondergaard, N.A., Maribo, D.
Published in Electrical Contacts, 1988., Proceedings of the Thirty Fourth Meeting of the IEEE Holm Conference on Electrical Contacts (1988)