@Misc{ 
  BonKnüRog15,
  author = { Bonacini, Marco and Knüpfer, Hans and Röger, Matthias },
  title = { Optimal distribution of oppositely charged phases: perfect screening and other properties },
  journal = { SIAM J. Math. Anal. },
  year = { 2015 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2696/ },
  note = { cvgmt preprint}
}