References

• Bartolini C., Guarnieri A., Lolli M., et al., 1997, IAU Circ. 6800
• Boattini A., 1998 (private communication)
• Bond H.E., Balam D., Sahu K.C., 1998, GCN 22
• Castro-Tirado A.J., et al., 1997, IAU Circ. 6800 NASA ADS
• Coletta A., Gandolfi G., Smith M., et al., 1997, IAU Circ. 6796 NASA ADS
• Djorgovski S.G., Kulkarni S.R., Ramaprakash A.N., 1998, GCN 25
• Landolt A.U., 1992, AJ 104, 340 NASA ADS
• Piro L., Soffitta P., Butler R.C., et al., 1997, IAU Circ. 6797

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