Buchkapitel
Knicker, H.; Schmidt, M. W. I.; Kögel-Knabner, I.: The structure of organic nitrogen in particle size fractions determined by
15N CPMAS NMR. In: Effect of mineral organic microorganism interactions on soil and freshwater environments, S. 143 - 149 (Hg. Berthelin, J.; Huang, P. M.; Bollag, J. M.; Andreux, F.). Kluwer, New York (1999)