@Article{bg-3-397-2006,
AUTHOR = {Preston, C. M. and Schmidt, M. W. I.},
TITLE = {Black (pyrogenic) carbon: a synthesis of current knowledge and uncertainties with special consideration of boreal regions},
JOURNAL = {Biogeosciences},
VOLUME = {3},
YEAR = {2006},
NUMBER = {4},
PAGES = {397--420},
URL = {http://www.biogeosciences.net/3/397/2006/},
ISSN = {1726-4170}
}