Variabile BL Herculis (Italian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Variabile BL Herculis" in Italian language version.

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doi.org

G. Wallerstein, The Cepheids of Population II and Related Stars, in The Publications of the Astronomical Society of the Pacific, vol. 114, n. 797, 2002, pp. 689-699, DOI:10.1086/341698. URL consultato il 10 marzo 2014.

John R. Percy, Understanding Variable Stars, Cambridge, Cambridge University Press, 2007, pp. 161-172, ISBN 978-0-521-23253-1. URL consultato il 16 marzo 2014.

G. Wallerstein, The Cepheids of Population II and Related Stars, in The Publications of the Astronomical Society of the Pacific, vol. 114, n. 797, 2002, pp. 689-699, DOI:10.1086/341698. URL consultato il 10 marzo 2014.
I. Soszyński et al., The Optical Gravitational Lensing Experiment. The OGLE-III Catalog of Variable Stars. II.Type II Cepheids and Anomalous Cepheids in the Large Magellanic Cloud, in Acta Astronomica, vol. 58, 2008, pp. 293-312. URL consultato il 10 marzo 2014.

S. W. Hodson, A. N. Cox, D. S. King, The Masses and Pulsations of BL Herculis Variables (PDF), su library.lanl.gov, Los Alamos National Laboratory. URL consultato il 10 marzo 2014.

General Catalogue of Variable Stars, su GCVS, Institute of Astronomy of Russian Academy of Sciences and Sternberg State Astronomical Institute. URL consultato il 17 marzo 2014.