M. Connors, C. Veillet, R. Brasser, P. Wiegert, P. W. Chodas, S. Mikkola, K. Innanen: Horseshoe Asteroids and Quasi-satellites in Earth-like Orbits. in: 35th Lunar and Planetary Science Conference, 15.–19. März 2004. League City Texas 2004, 3., Abstract Nr. 1565 (PDF).