KOTKOVÁ, Lenka, TICHÝ, M., MORAVEC, Z., ITO, K., SUGIE, A., IKARI, Y., ASAMI, A., MAURY, A., ALBANESE, D., HAHN, G. Comet C/1997 J1 (Mueller). International Astronomical Union. Central Bureau for Astronomical Telegrams. Circular. 1997, May 6(6644), 1-1. ISSN 0081-0304.