@InProceedings{Das Sarma2012Distributed,
	 author =	{Atish Das Sarma and Stephan Holzer and Liah Kor and Amos Korman and Danupon Nanongkai and Gopal Pandurangan and David Peleg and Roger Wattenhofer},
	 title =	{{Distributed Verification and Hardness of Distributed Approximation}},
	 booktitle =	{{SIAM Journal on Computing (special issue of STOC 2011)}},
	 month =	{November},
	 year =		{2012}
}