Flores, E., Viallon, J., Choteau, T., Moussay, P., Idrees, F., Wielgosz, R. I., et al. (2019). International comparison: Report of the Pilot study CCQM-P188 (in parallel with CCQM-K120.a and b). Metrologia, 56(1A): 08012. doi:10.1088/0026-1394/56/1A/08012.