1. Aumann, H.H.: 1985, ?Protoplanetary material around nearby stars?, inThe search for extraterrestrial life: recent developments, ed. M.Papagiannis (Reidel), pp. 43?50.
2. Belyaev, N.A., Kresak, L., Pittich, E.M., Pushkarev, A.N.: 1986,Catalogue of short-period comets, Slovak Acad. Sci. Bratislava.
3. Benest, D.: 1971, ?Elliptic Restricted Problem for Sun-Jupiter: Existence of Stable Retrograde Satellites at Large Distance.?,Astron. Astrophys.,13,157?160.
4. Benest, D.: 1974/1975/1976, ?Effects of the Mass Ratio on the Existence of Retrograde Satellites in the Circular Plane Restricted Problem I/II/III?,Astron. Astrophys.,32,39?46/45,353?363/53,231?236.
5. Benest, D.: 1979, ?Derniers Résultats dans l'Etude du Problème Restreint.?, inMécanique Céleste, Astrométric et Géodésie, ed.GS5 (Obs.Bordeaux), p. 23.