1. 8th ABC Symposium “Trace Elements — Relation to Living Things”,1987
2. Vegetable Factories;Takatsuji;Maruzen,1986
3. Life and Metals;Ochiai;Kyoritsushuppan,1991
4. Living Things and Trace Elements—Past, Present and Future—;Fuwa;Biomed. Res. on Trace Elements,1990
5. Über die Allgegenwart der chemischen Elemente