@article {Lavelle2006,
	title = {Soil invertebrates and ecosystem services},
	journal = {European Journal of Soil Biology},
	volume = {42},
	year = {2006},
	pages = {S3{\textendash}S15},
	keywords = {bioindicators, ecosystem engineers, self-organized systems, soil invertebrates},
	doi = {10.1016/j.ejsobi.2006.10.002},
	author = {Lavelle, P and Deca{\"e}ns, T and Aubert, M and Barot, S and Blouin, M and Bureau, F and Margerie, P}
}
@article {Cesarz2007,
	title = {Earthworm communities in relation to tree diversity in a deciduous forest},
	journal = {European Journal of Soil Biology},
	volume = {43},
	year = {2007},
	pages = {S61{\textendash}S67},
	keywords = {ash, beech, earthworm diversity, lime, lumbricidae, mixed forest, tree diversity},
	issn = {11645563},
	doi = {10.1016/j.ejsobi.2007.08.003},
	url = {http://linkinghub.elsevier.com/retrieve/pii/S1164556307000817},
	author = {Cesarz, Simone and Fahrenholz, Nadine and Migge-Kleian, Sonja and Platner, Christian and Schaefer, Matthias}
}
