by Sprik, R, Walraven, JT, van Yperen GH, Silvera, IF
Published in Physical review. B, Condensed matter (01.11.1986)

by Duyn, J H, Moonen, C T, van Yperen, G H, de Boer, R W, Luyten, P R
Published in NMR in biomedicine (01.03.1994)

by Jara, H, Soto, J A, Yu, B, Hentzen, P C, van Yperen, G H, Yucel, E K
Published in Magnetic resonance in medicine (01.11.1996)