APEX CO observations towards the photodissociation region of RCW 120 M. Figueira, A. Zavagno, L. Bronfman, D. Russeil, R. Finger and F. Schuller A&A, 639 (2020) A93 Published online: 14 July 2020 DOI: 10.1051/0004-6361/202037713