@article{munoz2004scattering,
    title={Scattering matrices of volcanic ash particles of Mount St. Helens, Redoubt, and Mount Spurr volcanoes},
    author={Munoz, O and Volten, H and Hovenier, JW and Veihelmann, B and Van Der Zande, WJ and Waters, LBFM and Rose, William I},
    journal={Journal of Geophysical Research: Atmospheres},
    volume={109},
    number={D16},
    year={2004},
    publisher={Wiley Online Library}
    }