1. Barbieri, C., TNG Technical Report No. 53, November 1995
2. Baffa, C., & Comoretto, G. 1996, Arcetri Technical Report No. 3
3. Baffa, C., Comoretto, G., Gavrioussev, V., Giani, E., & Lisi, F. 1999, Mem. Soc. Astron. It., in press
4. Baffa, C. 2000, Arcetri Technical Report No. 2
5. Comoretto, G., Baffa, C., Gavrioussev, V., Giani, E., & Lisi, F. 1999, Mem. Soc. Astron. It., in press