@misc{misc0eb2ec18,
title   = {Solar observations: determination of the fundamental system and the orbital elements},
author = {Penna, J L and Benevides-Soares, Paulo and Andrei, A H and Laclare, F and Leister, Nelson Vani},
year = {1996},
booktitle   = {Reunion Regional Latinoamericana de Astronomia}
}