Smith, K.A., Ball, T., Conen, F., Dobbie, K.E., Massheder, J. & Rey, A. 2003. Exchange of greenhouse gases between soil and atmosphere: interactions of soil physical factors and biological processes. European Journal of Soil Science, 54, 779–791.: Commentary on the impact of Smith et al. (2003) by G. Guggenberger, B. Ludwig and M. Menon. (18th January 2018)