1. On the Hausdorff volume in sub-Riemannian geometry;Agrachev;Calc. Var. Partial Differential Equations,2012
2. A. Agrachev, D. Barilari, U. Boscain, Introduction to Riemannian and sub-Riemannian geometry (from a Hamiltonian viewpoint), preprint SISSA 09/2012/M, 2014. Lecture notes available at http://webusers.imj-prg.fr/~davide.barilari/Notes.php.
3. A Gauss–Bonnet-like formula on two-dimensional almost-Riemannian manifolds;Agrachev;Discrete Contin. Dyn. Syst.,2008
4. Sub-Riemannian vs. Euclidean dimension comparison and fractal geometry on Carnot groups;Balogh;Adv. Math.,2009
5. A formula for Popp’s volume in sub-Riemannian geometry;Barilari;Anal. Geom. Metr. Spaces,2013