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Cite this article as

Sun Kwok (2007) Planetary nebulae. Scholarpedia, 2(9):4338

which always refers to the latest approved version. If you need to cite this particular revision of the article (for whatever reason), write

Sun Kwok (2007) Planetary nebulae. Scholarpedia, 2(9):4338, revision #22499

To link to this article, use the following snippet

Sun Kwok (2007) <a href='http://www.scholarpedia.org/article/Planetary_nebulae'>Planetary nebulae</a>. <a href='http://www.scholarpedia.org'>Scholarpedia</a>, 2(9):4338

BIBTEX:

@ARTICLE{Kwok:2007,
AUTHOR = {Kwok, S. },
TITLE  = {Planetary nebulae},
YEAR  = {2007},
JOURNAL  = {Scholarpedia},
VOLUME  = {2},
NUMBER  = {9},
PAGES  = {4338}
}

RIS:

TY  - JOUR
JO  - Scholarpedia
T1 - Planetary nebulae
UR  - http://www.scholarpedia.org/article/Planetary_nebulae
AU - Kwok, S.
PY  - 2007
VL  - 2
SP  - 4338
ER  - 

EndNote:

%A Kwok, S
%D 2007
%J Scholarpedia
%U http://www.scholarpedia.org/article/Planetary_nebulae
%P 4338
%T Planetary nebulae
%V 2
%0 Journal Article

DBLP:

Volume 2, Number 9
<ul>

<li>Sun Kwok:
Planetary nebulae.
4338
<ee>http://www.scholarpedia.org/article/Planetary_nebulae</ee>

</ul>