Review of instrumental inter‐agreement study of spectral and colorimetric data of commercial multiangle spectrophotometers

The authors are grateful to the EMRP for funding the project “Bidirectional reflectance definitions” (16NRM08). The EMRP is jointly funded by EMRP participating countries within EURAMET and the European Union. We thank the Spanish Ministry of Economy and Competitiveness for the project DPI2015-65814-R.