Blower, Philip J.; Dilworth, Jonathan R.; Leigh, G. Jeffery; Neaves, Bryan D.; Normanton, Fred B.; et al.
Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry (1972-1999), 1985 , p. 2647 - 2654

Smith, Raymond J.; Powell, Anne K.; Barnard, Neil; Dilworth, Jonathan R.; Blower, Philip J.
Journal of the Chemical Society, Chemical Communications, 1993 , # 1 p. 54 - 56

J. Gen. Chem. USSR (Engl. Transl.), , vol. 53, # 7 p. 1572 - 1574,1419 - 1421