1. Chemical analysis of ecological materials;Allen,1974
2. The organization of soil animal communities;Anderson;Ecol. Bull.,1977
3. Tropical soil biology and fertility. A handbook of methods;Anderson,1993
4. Relationships between earthworms and some plants species in a meadow;Babel;Soil Biol. Biochem.,1992
5. Impact du reboisement spontané des tiennes calcaires de l'Entre-Sambre-et-Meuse sur quelques peuplements d'arthropodes vagiles;Bara;Parcs Nationaux,1985