Zeeman effect in sulfur monoxide - A tool to probe magnetic fields in star forming regions Gabriele Cazzoli, Valerio Lattanzi, Sonia Coriani, Jürgen Gauss, Claudio Codella, Andrés Asensio Ramos, José Cernicharo and Cristina Puzzarini A&A, 605 (2017) A20 Published online: 01 September 2017 DOI: 10.1051/0004-6361/201730858