The Greek government on Wednesday announced it has appointed BNP-Paribas, Deutsche Bank and HSBC as co-underwriters in the implementation of PSI (private sector involvement in a voluntary bond swap scheme), an agreement to re-invest in Greek state bonds and a bond buyback program agreed in a recent EU Summit. A finance ministry statement also said that Gottlieb Steen & Hamilton LLP law firm was appointed as legal advisor and Lazard Freres as financial advisor of the Greek state.