Jukka Pumpanen, Kolari, Pasi , Ilvesniemi, Hannu , Minkkinen, Kari , Vesala, Timo , Niinistö, Sini , Lohila, Annalea , Larmola, Tuula , Morero, Micaela , and Pihlatie, Mari . 2004. “Comparison Of Different Chamber Techniques For Measuring Soil Co2 Efflux”. Agricultural And Forest Meteorology, 123, Pp. 159-176.