@Article{ BorKli22, author = { Borza, Samuël and Klingenberg, Wilhelm }, title = { Local non-injectivity of the exponential map at critical points in sub-Riemannian geometry }, journal = { Nonlinear Analysis }, year = { 2024 }, doi = { https://doi.org/10.1016/j.na.2023.113421 }, volume = { 239 }, pages = { 113421 }, URL = { http://cvgmt.sns.it/paper/6741/ }, note = { cvgmt preprint} }