1. D.C.B. Whittet and A.G.G.M. Tielens, in: Y. Pendleton, A.G.G.M. Tielens (Eds.), From Stardust to Planetesimals, Astron. Soc. Pac. Conf. Series Book, S. Francisco, Vol. 122, 1997, p. 161
2. Y.J. Pendleton, J.E. Chiar, in: Y. Pendleton, A.G.G.M. Tielens (Eds.), From Stardust to Planetesimals, Astron. Soc. Pac. Conf. Series Book, S. Francisco, Vol. 122, 1997, p. 179
3. S.A. Sandford, L.A. Allamandola, M.P. Bernstein, in: Y. Pendleton, A.G.G.M. Tielens, From Stardust to Planetesimals, Astron. Soc. Pac. Conf. Series Book, S. Francisco, Vol. 122, 1997, p. 201
4. C. de Bergh, M. Festou, B. Schmitt (Eds.), Solar System Ices, Kluwer, Dordrecht, 1998
5. G. Strazzulla, in: C. de Bergh, M. Festou, B. Schmitt (Eds.), Solar System Ices, Kluwer, Dordrecht, 1998, p. 281