H. N. J.  Sommer, S. G, ?Ammonia emission from field applied manure and its reduction?invited paper?, European Journal of Agronomy, vol. 15, pp. 1-15, 2001.

N. J.  Hutchings, Sommer, S. G., Andersen, J. M., and Asman, W. A. H., ?A detailed ammonia emission inventory for Denmark?, Atmospheric Environment, vol. 35, 2001.

J.  Balik, Cerny, J., Tlustos, P., and Zitkova, M., ?Nitrogen balance and mineral nitrogen content in the soil in a long experiment with maize under different systems of N fertilization.?, Plant Soil Environment, vol. 49, pp. 554-559, 2003.

S. G.  Sommer, Genermont, S., Cellier, P., Hutchings, N. J., and Olesen, J. E, M. T., ?Processes controlling ammonia emission from livestock slurry in the field?, European Journal of Agronomy, vol. 19, pp. 465-486, 2003.

C. F.  Borsting, Kristensen, T., Misciattelli, L., Hvelplund, T., and Weisbjerg, M. R., ?Reducing nitrogen surplus from dairy farms. Effects of feeding and management.?, Livestock Production Science, no. 83, pp. 165-178, 2003.

U.  Daemmgen and Webb, J., ?The development of the EMEP/CORINAIR Guidebook with respect to the emissions of different nitrogen and carbon species from animal production.?, Agriculture, Ecosystems and Environment, vol. 112, 2006.

O.  Oenema, Oudendag, D., and Velthof, G. L., ?Nutrient losses from manure management in the European Union?, Lifestock Science, vol. 112, pp. 261-272, 2007.

P.  Kai, Pedersen, P., jensen , J. E., Hansen, M. N., and Sommer, S. G., ?A whole-farm assessment of the efficacy of slurry acidification in reducing ammonia emissions?, European Journal of Agronomy, vol. 28, pp. 148-154, 2007.

M. A.  Sutton, Erisman, J. W., Dentener, F., and Möller, D., ?Ammonia in the environment: From ancient times to the present?, Environmental Pollution, vol. 156, pp. 583-604, 2008.

U.  Daemmgen and Hutchings, N. J., ?Emissions of gaseous nitrogen species from manure management: A new approach?, Environmental Pollution, no. 154, pp. 488-497, 2008.

T.  Nyord, Schelde, K. M., Sogaard, K. T., Jensen, L. S., and Sommer, S. G., ?A simple model for assessing ammonia emission from ammoniacal fertilisers as affected by pH and injection into soil?, Atmospheric Environment, vol. 42, pp. 4656-4664, 2008.

S. G.  Sommer, Ostergard, H. S., Lofstrom, P., Andersen, H. V., and Jensen, L. S., ?Validation of model calculation of ammonia deposition in the neighbourhood of a poultry farm using measured NH3 concentrations and N deposition?, Atmospheric Anvironment, vol. 43, 2008.

F. G. L. J. K. M. M. N. S. M. S. M. G. D. M. S.  Geupel, Jering, ?Hintergrundpapier zu einen multimedialen Stickstoffemissionsminderungs-Strategie?, Umwelt Bundes Amt, 2009.

S. G.  Sommer, Schjoerring, J. K., and Denmead, O. D., ?Ammonia emissions from mineral fertylisers and fertylised crops ?, Advances in Agronomy, vol. 82, In Press.