1. Ambika, G., Kembhavi, A.K., & Mattei, J.A.: n.d., presented at the workshop on Celestial Mechanics and Dynamical Systems held at IUCAA, Pune, 2001.
2. Barthès, D., & Luri, X. 2001, A&A, 365, 519
3. Buchler, J.R., & Kolláth, Z. 2001, nlin.CD/0109028 (in French)
4. Buchler, J.R., Kolláth, Z., & Cadmus, R. 2001, astro-ph/0106329
5. Cioni, M.-R., Marquette, J.-B., Loup, C. et al. 2001, A&A, 377, 945