%0 journal article %@ 0031-9007 %A Havermeyer, F., Rupp, R. A., Lyuksyutov, S. F., Eckerlebe, H., Staron, P., Vollbrandt, J. %D 1998 %J Physical Review Letters %N 15 %P 3272-3275 %T Nondestructive resolution of higher harmonics of light-induced volume gratings in PMMA with Cold Neutrons %U 15 %X