References

<biblio>

1. planck2011-7-0 bibtex=@ARTICLE{planck2011-7.0,

author = {Planck Collaboration XIX}, title = {Planck early results. XIX. All-sky temperature and dust optical depth from Planck and IRAS --- constraints on the "dark gas" in our Galaxy}, journal = {A&A}, year = {2011}, volume = {536}, pages = {A19} } </biblio>