1. Frindik O (1986) Landwirtsch Forsch 39:75?86
2. Frindik O (1988) Landwirtsch Forsch 41:18?193
3. Frindik O (1989) Z Lebensm Unters Forsch 189:236?240
4. Linsalata P, Eisenbud M, Franca EP (1986) Health Phys 50(1):163?167
5. Ibrahim SA, Singh NP, Cohen N, Saccomanno G, Wrenn ME (1981) In: Wrenn ME (ed) Actinides in man and animals. Snowbird USA, Oct. 14?18 1979, Salt Lake City, Proceedings, pp 207?216