Rufińska, A., Goddard, R., Weidenthaler, C., Bühl, M., & Pörschke, K.-R. (2006). Structural properties and dynamics of five-coordinate nickel(II)-π-allyl complexes containing monodentate phosphorus ligands. Organometallics, 25, 2308-2330. doi:10.1021/om0601807.