1. F. Matteucci, in Origin and Evolution of the Elements, Ed. by A. McWilliam and M. Rauch (Cambridge Univ. Press, 2003), Carnegie Astrophys. Ser., p. 1.
2. D. Z. Wiebe, A. V. Tutukov, and B. M. Shustov, Astron. Zh. 78, 977 (2001) [Astron. Rep. 45, 854 (2001)].
3. B. A. Twarog, K. M. Ashman, and B. J. Anthony-Twarog, Astron. J. 114, 2556 (1997).
4. S. M. Andrievsky, D. Bersier, V. V. Kovtyukh, et al., Astron. Astrophys. 384, 140 (2002).
5. S. M. Andrievsky, R. E. Luck, P. Martin, and J. R. D. Lepine, Astron. Astrophys. 413, 159 (2004).