@Misc{ 
  NguNgu20,
  author = { Nguyen, Hoai-Minh and Nguyen, Quoc-Hung },
  title = { The Weyl law of transmission eigenvalues and the completeness of generalized transmission eigenfunctions },
  journal = {  },
  year = { 2020 },
  pages = { 26 },
  URL = { http://cvgmt.sns.it/paper/4910/ },
  note = { cvgmt preprint}
}