@incollection {Casey,
  AUTHOR = {Larsen, Christopher and Richardson, Casey  and Sarkis, Marcus},
  TITLE = {A level set method for the {M}umford-{S}hah functional and fracture},
   booktitle = {Technical Report Serie A 581},
publisher =  {Institute de Matematica Pura e Aplicada},
 Month = {January}, 
  YEAR = {2008},
}