The ESO SupJup Survey - VI. 12C/13C isotope ratio comparison of three L-type brown dwarfs W. Mulder, S. de Regt, R. Landman, D. González Picos, I. A. G. Snellen, Y. Zhang, S. Gandhi, C. Ginski, A. Y. Kesseli, E. Nasedkin and T. Stolker A&A, 694 (2025) A164 Published online: 11 February 2025 DOI: 10.1051/0004-6361/202452859