Post-AGB Star (protoplanetary nebulae)
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IDENTIFICATION OF THREE NEW PROTOPLANETARY NEBULAE EXHIBITING THE
UNIDENTIFIED FEATURE AT 21 μmhttp://iopscience.iop.org/0004-637X/738/2/121/pdf/apj_738_2_121.pdf
An evolutionary catalogue of Galactic post-AGB and related objects
http://fr.arxiv.org/abs/astro-ph/0703717
A spectroscopic atlas of post-AGB stars and planetary nebulae selected from the IRAS Point Source Catalogue
http://fr.arxiv.org/abs/astro-ph/0608080
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