B.  Punji, Mague, J. T., and Balakrishna, M. S., ?Thioether-functionalized ferrocenyl-bis(phosphonite), Fe(C5H4)P(?OC10H6(?-S)C10H6O?)2:? synthesis, coordination behavior, and application in suzuki-miyaura cross-coupling reactions?, Inorganic Chemistry, vol. 46, no. 24, pp. 10268?10275, 2007.