1. Ergebnisse Mehrjahriger Kontinuierlicher Registrierungen Der Zahl Der Atmospharischen Kondensationskerne in St. Moritz;Bider Von;Geofis. pura e appl.,1957
2. The diurnal variation of atmospheric condensation nuclei;Bradbury;J. Terr. Magn.,1938
3. Some characteristics of Aitken nucleus concentration;Hogan;J. Rech. Atmos.,1966
4. Experiments with nucleus counters in maritime atmospheres;Hogan;J. Rech. Atmos.,1968
5. A new instrument for the continuous measurement of condensation nuclei;Skala;Analyt. Chem.,1963