Massive pre-main-sequence stars in M17 - First and second overtone CO bandhead emission and the thermal infraredJ. Poorta, M. C. Ramírez-Tannus, A. de Koter, F. Backs, A. Derkink, A. Bik and L. KaperA&A, 676 (2023) A122DOI: https://doi.org/10.1051/0004-6361/202245658
