@Article{ 
  TorVel25,
  author = { Tortone, Giorgio and Velichkov, Bozhidar },
  title = { Vectorial Bernoulli Problems and Free Boundary Systems },
  journal = { La Matematica },
  year = { 2026 },
  doi = { 10.1007/s44007-026-00195-z },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/7355/ },
  note = { cvgmt preprint}
}