@Article{ 
  KreFri90,
  author = { Friedrich, Manuel and Kreutz, Leonard },
  title = { Finite crystallization and wulff shape emergence for ionic compounds in the square lattice },
  journal = { Nonlinearity },
  year = { 2019 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4244/ },
  note = { cvgmt preprint}
}