DUŠEK, Jiří and
Zdeněk MIKULÁŠEK. Preliminary analysis of light curves of the seven carbon stars.
Contributions of the Astronomical Observatory Skalnaté Pleso. Tatranska Lomnica, Slovak Republic: Astronomický ústav SAV, 2003, vol. 33, No 1, p. 13-17. ISSN 1335-1842.