Comet P/2013 r3 Catalina-PanstarrsK. Nishiyama, G. V. Williams, A. R. Gibbs et al.|Central Bureau Electronic Telegrams|2013Cited by 2
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Comet C/2017 u5 (panstarrs)A. F. Tubbiolo, G. V. Williams, J. V. Scotti et al.|Central Bureau Electronic Telegrams|2017Cited by 0