Sutton, M. A., Oenema, O.
, Dalgaard, T. & Howard, C. (2014).
Preface. I S. Bittman, M. Dedina, C. M. Howard, O. Oenema & M. Sutton (red.),
Options for Ammonia Mitigation: Guidance from the UNECE Task Force on Reactive Nitrogen (s. v). Centre for Ecology & Hydrology.