@article {planck2015XI,
	title = {Planck 2015 results. XI. CMB power spectra, likelihoods, and robustness of parameters},
	journal = {\aap},
	volume = {594},
	year = {2016},
	month = {oct},
	pages = {A11},
	author = {\sorthelpPlanck Collaboration 201611Planck Collaboration and et al.}
}
