On changes in the spectra of Comet C/1999 S4 (LINEAR) on July 22−28, 2002 by Chubko, L.S., Churyumov, K.I., Lukyanyk, I.V., Kleshchonok, V.V.

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Exploration of spectra of periodic Comet 153P/Ikeya−Zhang by Churyumov, K.I., Lukyanyk, I.V., Chubko, L.S., Kleshchonok, V.V., Berezhnoy, A.A., Chavushyan, V.H., Sandoval, L., Palma, A.

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