@Article{acpd-4-399-2004,
AUTHOR = {H\"offner, J. and Friedman, J. S.},
TITLE = {Metal layers at high altitudes: A possible connection to meteoroids},
JOURNAL = {Atmospheric Chemistry and Physics Discussions},
VOLUME = {4},
YEAR = {2004},
NUMBER = {1},
PAGES = {399--417},
URL = {http://www.atmos-chem-phys-discuss.net/4/399/2004/},
DOI = {10.5194/acpd-4-399-2004}
}