Generalised Picone’s identity and some Qualitative properties of p-sub-Laplacian on Heisenberg group. Advances in the Theory of Nonlinear Analysis and its Application, [S. l.], v. 5, n. 2, p. 232–239, 2023. Disponível em: https://mail.atnaea.org/index.php/journal/article/view/198.. Acesso em: 19 apr. 2026.