?url_ver=Z39.88-2004&rft_id=10.1007%2Fs10957-009-9620-6&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Gnecco&rft.aufirst=Giorgio&rft.au=Gnecco%2C+Giorgio&rft.title=Journal+of+Optimization+Theory+and+Applications&rft.atitle=Estimates+of+Variation+with+Respect+to+a+Set+and+Applications+to+Optimization+Problems&rft.date=2010&rft.volume=145&rft.issue=1&rft.pages=53-75&rft.issn=0022-3239&rft.genre=article