@Article{ 
  CFHLLS23,
  author = { Cavallina, Lorenzo and Funano, Kei and Henrot, Antoine and Lemenant, Antoine and Lucardesi, Ilaria and Sakaguchi, Shigeru },
  title = { Two extremum problems for Neumann eigenvalues },
  journal = { J. Anal. Math. },
  year = { 2025 },
  doi = { 10.1007/s11854-025-0366-3 },
  volume = { 155 },
  number = { 2 },
  pages = { 657-697 },
  URL = { http://cvgmt.sns.it/paper/6341/ },
  note = { cvgmt preprint}
}