1. Das Verhalten von Zinksalzen gegen Pflanzen und in Böden;Baumann;Landwirtsch. Vers.-Stn.,1885
2. Nickel accumulation by European species of the genus Alyssum;Brooks,1978
3. Detection of nickeliferous rocks by analysis of herbarium specimens of indicator plants;Brooks;J. Geochem. Explor.,1977
4. Hyperaccumulation of nickel by Alyssum L. (Cruciferae);Brooks,1979
5. Thlaspi;Clapham,1964