Soshnikov, I. E., Semikolenova, N. V., Shubin, A. A., Bryliakov, K. P., Zakharov, V. A., Redshaw, C., & Talsi, E. P. (2009). EPR monitoring of vanadium(IV) species formed upon activation of vanadium(V) polyphenolate precatalysts with AlR2Cl and AlR 2Cl/ethyltrichloroacetate (R = Me, Et). Organometallics, 28(23), 6714-6720. https://doi.org/10.1021/om900515h