Ayala V, Diniz MM, Lima JC, Veloso JM, Tribuzy I. Wave Front Sets Singularities of Homogeneous Sub-Riemannian Three Dimensional Manifolds. CUBO [Internet]. 2008 Jul. 1 [cited 2025 Oct. 13];10(2):107–134. Available from: https://cubo.ufro.cl/index.php/cubo/article/view/1519