@Misc{ 
  Mai26,
  author = { Maiale, Francesco Paolo },
  title = { A note on harmonic polynomials on Heisenberg and Carnot groups },
  journal = {  },
  year = { 2026 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/7567/ },
  note = { cvgmt preprint}
}