S. J. Clemett, S. Messenger, X. D. F. Chillier, X. Gao, R. M. Walker, and R. N. Zare, “Indigenous Polycyclic Aromatic Hydrocarbon Molecules in Circumstellar Graphite Grains,” Lunar Planet. Sci. Conf. XXVII,229 (1996).
S. J. Clemett, S. Messenger, X. D. F. Chillier, X. Gao, R. M. Walker, and R. N. Zare, “Indigenous Polycyclic Aromatic Hydrocarbon Molecules in Circumstellar Graphite Grains,” Lunar Planet. Sci. Conf. XXVII,229 (1996).