@article {Eggleton2009,
	title = {A six year study of earthworm (Lumbricidae) populations in pasture woodland in southern England shows their responses to soil temperature and soil moisture},
	journal = {Soil Biology and Biochemistry},
	volume = {41},
	number = {9},
	year = {2009},
	pages = {1857{\textendash}1865},
	publisher = {Elsevier Ltd},
	keywords = {soil ecosystem engineers},
	issn = {00380717},
	doi = {10.1016/j.soilbio.2009.06.007},
	url = {http://linkinghub.elsevier.com/retrieve/pii/S003807170900217X},
	author = {Eggleton, Paul and Inward, Kelly and Smith, Joanne and Jones, David T. and Sherlock, Emma}
}
@article {Krell2005,
	title = {Quantitative extraction of macro-invertebrates from temperate and tropical leaf litter and soil: efficiency and time-dependent taxonomic biases of the Winkler extraction},
	journal = {Pedobiologia},
	volume = {49},
	number = {2},
	year = {2005},
	pages = {175{\textendash}186},
	issn = {00314056},
	doi = {10.1016/j.pedobi.2004.10.005},
	url = {http://linkinghub.elsevier.com/retrieve/pii/S0031405604001374},
	author = {Krell, Frank-Thorsten and Chung, Arthur Y.C. and DeBoise, Emma and Eggleton, Paul and Giusti, Alessandro and Inward, Kelly and Krell-Westerwalbesloh, Sylvia}
}
