1. Birkle, K., 1984. In ‘Astronomy with Schmidt-Type Telescopes’, ed. M. Capaccioli, IAU coll. 78, p. 203.
2. Borra, E.F., Edwards, G., Petrucci, F., Beauchemin, M., Brousseau, D., Grondin, L. and Beaulieu, A., 1987. Publ. Astron. Soc. Pacific, 99, 535.
3. Guibert, J. and Moreau, O., 1991. The Messenger, 64, 69.
4. Moreau, O., 1992. PhD Thesis, Université de Paris 7.
5. Paturel, G., Fouqué, P., Bottinelli, L. Gouguenheim, L., 1989. Astron. Astrophys. Suppl., 80,299.