0 Pogány, A Mohácsi, Á Jones, S.K Nemitz, E Varga, A Bozóki, Z Galbács, Z Weidinger, T Horváth, L Szabó, G. 2010 A diode laser based photoacoustic instrument using preconcentration sampling for measuring surface-atmosphere exchange of ammonia with the aerodynamic gradient method. Atmospheric Environment Elsevier 44 1490-1496