1. Reuse of spent potlining from the aluminium industry;Comissao de Meio Ambiente da Abal;Minercao Metalurgia,1990
2. Spent potlining: Water soluble components, landfill and alternative solutions;Pawlek,1992
3. NEN 7343: Leaching characteristics of solid earthy and stony building and waste materials — Leaching tests — Determination of the leaching of inorganic components from granular materials with the column test,1995
4. NEN 7349: Leaching characteristics of building and solid waste material, leaching tests, determination of inorganic components from granular materials with the cascade test,1995
5. CEN: Characterisation of waste. Leaching. Accept-test for leaching of granular waste materials. Determination of the leaching constituents from granular waste materials and sludges;Draft Europen Standard prEN 12457, CEN/TC 292,1996