@article{Kawakita_2011, title={FLUORESCENCE EXCITATION MODELS OF AMMONIA AND AMIDOGEN RADICAL (NH2) IN COMETS: APPLICATION TO COMET C/2004 Q2 (MACHHOLZ)}, volume={727}, ISSN={1538-4357}, url={http://dx.doi.org/10.1088/0004-637X/727/2/91}, DOI={10.1088/0004-637x/727/2/91}, number={2}, journal={The Astrophysical Journal}, publisher={American Astronomical Society}, author={Kawakita, Hideyo and Mumma, Michael J.}, year={2011}, month=jan, pages={91} }