^Krinsky, Jamin L.; Minasian, Stefan G.; Arnold, John. Covalent Lanthanide Chemistry Near the Limit of Weak Bonding: Observation of (CpSiMe3)3Ce−ECp* and a Comprehensive Density Functional Theory Analysis of Cp3Ln−ECp (E = Al, Ga). Inorganic Chemistry (American Chemical Society (ACS)). 2010-12-08, 50 (1): 345–357. ISSN 0020-1669. doi:10.1021/ic102028d.