1. Aarkrog, A. (1994). Direct contamination—Seasonality. In H. Dahlgaard (Ed.) Nordic radioecology, the transfer of radionuclides through Nordic ecosystems to man (pp. 149–163). Elsevier: Amsterdam.
2. Aarkrog, A., Bøtter-Jensen, L., Jiang, C. Q., Dahlgaard, H., Hansen, H., Holm, E., et al. (1988). Environmental radioactivity in Denmark in 1986. Risø-R-549, (pp. 272). Roskilde Denmark: Risø National Laboratory.
3. Bauman, A., Cesar, D., Franić, Z., Kovač, J., Lokobauer, N., Marović, G., et al. (1979–1992). Results of environmental radioactivity measurements in the Republic of Croatia, Annual Reports 1978–1991. Zagreb, Croatia: Institute for Medical Research and Occupational Health (In Croatian).
4. Engelmann, R. J. (1971). Scavenging prediction using ratios of concentrations in air and precipitation. Journal of Applied Meteorology, 10, 493–497.
5. Franić, Z. (1992). 137Cs in a radioactive fallout in Zagreb. Croatian Meteorological Journal, 27, 63–68.