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nih.gov
pubmed.ncbi.nlm.nih.gov
Buchard, Antoine; Heuclin, Hadrien; Auffrant, Audrey; Le Goff, Xavier F.; Le Floch, Pascal (2009). "Coordination of tetradentate X2N2 (X = P, S, O) ligands to iron(ii) metal center and catalytic application in the transfer hydrogenation of ketones". Dalton Transactions (9): 1659–67. doi:10.1039/b816439h. PMID19421611.
