?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Attouch&rft.aufirst=H%C3%A9dy&rft.issue=5-6&rft.volume=53&rft.date=2004&rft.atitle=A+Singular+Riemannian+Barrier+Method+for+Constrained+Minimization&rft.title=Optimization&rft.pages=435-454&rft.genre=article