Grebel, E. K., A. Y. Kniazev, D. B. Zucker, E. F. Bell and H. C. Harris: Planetary nebulae in the outer disk and halo of M31. In: Bulletin of the American Astronomical Society 36, 2, 801-801 (2004).
url: http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2004AAS...204.7401G&db_key=AST
http://edoc.mpg.de
The Max Planck Society does not take any responsibility for the content of this export.