%0 Journal Article %T Exchange of CO 2 , CH 4 and N 2 O between the atmosphere and two northern boreal ponds with catchments dominated by peatlands or forests %A Huttunen, Jari %A Väisänen, Tero %A Heikkinen, Mirja %A Hellsten, Seppo %A Nykänen, Hannu %A Nenonen, Olli %A Martikainen, Pertti %J Plant and Soil %V 242 %N 1 %P 137-146 %@ 0032-079X %D 2002-05-01 %I Kluwer Academic Publishers %~ DeepDyve