Saha, Tanmoy Kumar Imino phenoxide complexes of niobium and tantalum as catalysts for the polymerization of lactides, ε-caprolactone and ethylene. [electronic resource] - Dalton transactions (Cambridge, England : 2003) Jul 2013 - 10304-14 p. digital Publication Type: Journal Article ISSN: 1477-9234 Standard No.: 10.1039/c3dt50752a doi