@Misc{ 
  rie06,
  author = { Rieger, Marc Oliver },
  title = { Higher dimensional problems with volume constraints - Existence and Gamma-convergence },
  journal = {  },
  year = { 2006 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/136/ },
  note = { cvgmt preprint}
}