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Brewer, P J; Minarro, M D; Amico di Meane, E; Brown, R J C; Tuma, D*; Fröhlich, M*; Beránek, J*; Gilge, S*; Walden, J*; Cieciora, D*; Sega, M*; Lagler, F*; Mace, T*; Pascale, C*; Fükö, J*; Valkova, M*; Stummer, V*; Nieuwenkamp, G*; van der Veen, A M H* (2014) Key Comparison of nitrogen monoxide in nitrogen relevant to ambient levels (EURAMET QM-K26a / Project 1183). NPL Report. AS 87

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Pogany, A*; Balslev-Harder, D*; Braban, C F*; Cassidy, N; Ebert, V*; Ferracci, V; Hieta, T*; Leuenberger, D*; Martin, N A; Pascale, C*; Peltola, J*; Persijn, S*; Tiebe, C*; Twigg, M M*; Vaittinen, O*; van Wijk, J*; Wirtz, K*; Niederhauser, B* (2016) A metrological approach to improve accuracy and reliability of ammonia measurements in ambient air. Meas. Sci. Technol., 27 (11). 115012