Wilkinson, G.; Pauson, P. L.; Cotton, F. A., Bis-Cyclopentadienyl Compounds of Nickel and Cobalt, Journal of the American Chemical Society, 1954, volume 76, p. 1970-1974. DOI10.1021/ja01636a080.
Bertrand, J. A.; Cotton, F. A.; Dollase, W. A., "Metal-Metal Bonded, Polynuclear Complex Anion in CsReCl4", Journal of the American Chemical Society, 1963, volume 85, pages 1349-50. DOI10.1021/ja00892a029