Giant molecular filaments in the Milky Way S. E. Ragan, Th. Henning, J. Tackenberg, H. Beuther, K. G. Johnston, J. Kainulainen and H. Linz A&A, 568 (2014) A73 Published online: 21 August 2014 DOI: 10.1051/0004-6361/201423401