Phosphinated Linear Polystyrene as a Ligand of Palladium Catalysts for Ethoxy-Carbonylation of 4,4'-Dibromobiphenyls T. Hanaoka, T. Takeuchi, Y. Sugi, K. Teranishi, M. Okuno, and T. Sato [Catal.Lett., Vol.28, pp.337-342, 1994]