%0 conference poster %@ %A Emmler, T., Tsetsgee, O., Buntkowsky, G., Weinmann, M., Aldinger, F., Mueller, K. %D 2007 %J Rocky Mountain Conference on Analytical Chemistry %T 11B{15N} REDOR and 11B spin echo studies for structural characterization of Si-B-C-N precursor ceramics %U %X