1. Carbon-13 nuclear magnetic resonance analysis, lignin content and carbohydrate composition of humic substances from salt marsh estuaries;Alberts,1991
2. Pyrolysic decomposition of ligncellulosic materials;Fraga de Araujo,1990
3. Solid State Nuclear Magnetic Resonance of Fossil Fuels;Axelson,1985
4. Iron sulfides in Pleistocene deep sea sediments and their paleo-oceanographic significance;Berner,1974
5. Carbon accumulation rates and the origin of the Holocene sapropel in the Black Sea;Calvert;Geology,1987