@Misc{ 
  Gin23,
  author = { Ginster, Janusz },
  title = { On the formation of microstructure for singularly perturbed problems with 2,3 or 4 preferred gradients },
  journal = {  },
  year = { 2023 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/6022/ },
  note = { cvgmt preprint}
}