by Eriksson, A.S., Mattsson, J., Niklasson, A.J.
Published in NDT & E international : independent nondestructive testing and evaluation (01.10.2000)

by Larson, Mats G., Niklasson, A. Jonas
Published in SIAM journal on numerical analysis (01.01.2004)

by LARSON, Mats G, NIKLASSON, A. Jonas
Published in Numerische Mathematik (01.11.2004)

by Larson, M.G., Niklasson, A.J.
Published in Calcolo (01.07.2004)