Goodyear, W. H.
Udo Schweitzer
Evan Johnson
Charles Finney Yoder
André Deprit
Paul Edwin Kustaanheimo
G. Scheifele
C. Frederick Peters
C. R. Herron
Bengt Petersson
E. Leimanis
E. A. Ivanov
NATO Advanced Study Institute on Stability of the Solar System and Its Minor Natural and Artificial Bodies (1984 Cortina d'Ampezzo, Italy)
J. Berakdar
Rencontre de Moriond (7th 1972 Méribel, France)
J. Kurkijärvi
Unknown Author
Vincent Gillet
I. A. Gerasimov
R. W. Hilditch