Scientific journal publication Final report, on-going key comparison BIPM.QM-K1, ozone at ambient level, comparison with NILU, January 2018 Viallon, Joële; Idrees, Faraz; Moussay, Philippe; Wielgosz, Robert; Marsteen, Leif Publication details Journal: Metrologia, vol. 57, 2020 Doi: doi.org/10.1088/0026-1394/57/1A/08010