@Misc{ 
  CocGar16,
  author = { Coclite, Giuseppe Maria and Garavello, Mauro },
  title = { A Time Dependent Optimal Harvesting Problem with Measure Valued Solutions },
  journal = {  },
  year = { 2016 },
  pages = { 18 },
  URL = { http://cvgmt.sns.it/paper/2943/ },
  note = { cvgmt preprint}
}