Name	Info	Provider	Link
	subscription/membership/fee required	Nature Publishing Group	https://doi.org/10.1038/ismej.2011.101
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21833038/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/21833038
	free resource	Silverchair Information Systems	https://academic.oup.com/ismej/article-lookup/doi/10.1038/ismej.2011.101