Name	Info	Provider	Link
	free resource	BioMed Central	https://bmcstructbiol.biomedcentral.com/articles/10.1186/1472-6807-8-1
Free full Text at ORBi	free resource	ORBi (University of Liege)	https://hdl.handle.net/2268/63332
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18190694/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/18190694