@article{COCV_2010__16_3_695_0,
     author = {Castelpietra, Marco and Rifford, Ludovic},
     title = {Regularity properties of the distance functions to conjugate and cut loci for viscosity solutions of {Hamilton-Jacobi} equations and applications in riemannian geometry},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {695--718},
     publisher = {EDP-Sciences},
     volume = {16},
     number = {3},
     year = {2010},
     doi = {10.1051/cocv/2009020},
     mrnumber = {2674633},
     zbl = {1201.35087},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/cocv/2009020/}
}