Surfaces in the three-dimensional Heisenberg group on which the Gauss map has bounded Jacobian. (English. Russian original) Zbl 1231.53052
Math. Notes 89, No. 5, 746-748 (2011); translation from Mat. Zametki 89, No. 5, 794-796 (2011).
Reviewer: Luc Vrancken (Valenciennes)