1. A. D. Aleksandrov,
Uniqueness theorems for surfaces in the large. I,
Vestnik Leningrad. Univ. 11 (1956), no. 19, 5–17.
2. Z. M. Balogh, J. T. Tyson and E. Vecchi,
Intrinsic curvature of curves and surfaces and a Gauss–Bonnet theorem in the Heisenberg group,
Math. Z. 287 (2017), no. 1–2, 1–38.
3. D. Barilari, U. Boscain, D. Cannarsa and K. Habermann,
Stochastic processes on surfaces in three-dimensional contact sub-Riemannian manifolds,
Ann. Inst. Henri Poincaré Probab. Stat. 57 (2021), no. 3, 1388–1410.
4. A. Bonfiglioli, E. Lanconelli and F. Uguzzoni,
Stratified Lie Groups and Potential Theory for Their Sub-Laplacians,
Springer Monogr. Math.,
Springer, Berlin, 2007.
5. L. Capogna,
Isoperimetric inequalities in the Heisenberg group and in the plane,
Subelliptic PDE’s and Applications to Geometry and Finance,
Lect. Notes Semin. Interdiscip. Mat. 6,
Università degli Studi della Basilicata, Potenza (2007), 93–106.