Giant molecular filaments in the Milky Way - II. The fourth Galactic quadrantJ. Abreu-Vicente, S. Ragan, J. Kainulainen, Th. Henning, H. Beuther and K. JohnstonA&A, 590 (2016) A131DOI: https://doi.org/10.1051/0004-6361/201527674