@article {planckIntXLIX,
	title = {Planck intermediate results. XLIX. Parity-violation constraints from polarization data},
	journal = {\aap},
	volume = {596},
	year = {2016},
	pages = {A110},
	author = {\sorthelpPlanck Collaboration 201700Planck Collaboration and et al.}
}
