@article {2008,
	title = {Joint toxicity of copper and zinc to a terrestrial nematode community in an acid sandy soil},
	year = {2000},
	pages = { 219-228},
	author = {Korthals, G. W and Bongers, M and Fokkema, A and Dueck, T. A and Lexmond, T. M}
}
@article {1918,
	title = {Joint toxicity of copper and zinc to a terrestrial nematode community in an acid sandy soil},
	year = {2000},
	pages = {219-228},
	author = {Korthals, G. W and Bongers, M and Fokkema, A and Dueck, T. A and Lexmond, T. M}
}
