1. Metal resistance in earthworms; genetic adaptation or physiological acclimation?;Aziz;Pedobiologia,1999
2. Lombriciens de France: écologie et systématique;Bouché,1972
3. Stratégies lombriciennes;Bouché;Ecological Bulletin (Stockholm),1977
4. Biology and Ecology of Earthworms;Edwards,1996
5. Devon Great Consols: A study of Victorian mining enterprise;Goodridge;Reports of the Devonshire Association,1964