Vogel, Thomas Max Planck Institute for Mathematics, Max Planck Society;
Vogel_On the uniqueness_oa_2016.pdf (Any fulltext), 2MB
Vogel, T. (2016). On the uniqueness of the contact structure approximating a foliation. Geometry & Topology, 20(5), 2439-2573. doi:10.2140/gt.2016.20.2439.