\cite{Rayward_Smith_1991} \cite{Ragan_2009} Citing other papers is easy. Voilà: \cite{2012} or \cite{Holstein_2009}. Click on the cite button in the toolbar to search articles and cite them. Authorea also comes with a powerful commenting system. Don’t agree that \(E = mc^{3}\)?!? Highlight the text you want to discuss or click the comment button. Find out more about using Authorea on our help page. \cite{Francis_2009}\cite{Dobbs_2012}\cite{Reid_2009}\cite{Bobylev_2014}\cite{Eden_2013} \cite{Jackson2008} \cite{Pety_2013} \cite{Fuller_2009} \cite{Dame1986} \cite{Solomon_1989} \cite{Roman_Duval_2010} \cite{Grabelsky_1988} \cite{Garc_a_2014} \cite{Kruskal_1956} \cite{Combes_1991}

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\cite{Hachisuka_2015} \cite{Sanna_2011} \cite{Xu_2013} \cite{Zhang_2013} \cite{Sanna_2009} \cite{Dame_2011}

A SURVEY OF HIGH-LATITUDE MOLECULAR GAS IN THE NORTHERN GALACTIC HEMISPHERE\cite{Hartmann_1998} \cite{Digel_1996} \cite{Narayanan_2012} \cite{Magnani_2000} \cite{Goodman_2014} \cite{Zucker_2015}

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\cite{Heyer_2015}

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\cite{Choi_2014}

\cite{Wang_1995}

\cite{Ackermann_2012} \cite{Cheng_2014}

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