F. Musso; E. Solari; C. Floriani; K. Schenk. Hydrocarbon Activation with Metal Halides: Zirconium Tetrachloride Catalyzing the Jacobsen Reaction and Assisting the Trimerization of Alkynes via the Formation of η6-Arene-Zirconium(IV) Complexes. Organometallics. 1997, s. 4889–4895. DOI10.1021/om970438g.