Urmas Hõrrak

Diurnal variation in the concentration of air ions of different mobility classes in a rural area

Hannes Tammet, J. Salm, H. Tammet, 2003 .

General overview: European Integrated project on Aerosol Cloud Climate and Air Quality interactions (EUCAARI) - integrating aerosol research from nano to global scales

A.J.H. Visschedijk, Kai Zhang, Michael Schulz, 2011 .

Comparative study of the ultrafine aerosol particle and intermediate air ion concentration bursts in the atmosphere

Urmas Hõrrak, Eduard Tamm, Marko Vana, 2000 .

Statistical characterization of air ion mobility spectra at Tahkuse Observatory: Classification of air ions

Hannes Tammet, J. Salm, H. Tammet, 2000 .