1. Caesium-137 in Swedish milk and soil;LÖW;Nature,1959
2. Strontium-90 and caesium-137 in North American milk;KULP;Science,1961
3. Strontium-90 and caesium-137 in grass and milk in Finland during 1959;MIETTINEN;Nature,1961
4. Die radioaktiven Substanzen in der Milch;KNOOP;Milchwissenschaft, Jahrgang,1963
5. STRACKEE, L. and MATTERN, F. C. M., Strontium-90 and caesium-137 in Human Diet in the Netherlands during 1962. Rapport No. RA-21. Bilthoven (April 1964).