@article{JCA_2007_14_2_JCA_2007_14_2_a8,
     author = {G. Bellettini and M. Masala and M. Novaga},
     title = {A {Conjecture} of {De} {Giorgi} on the {Square} {Distance} {Function}},
     journal = {Journal of convex analysis},
     pages = {353--359},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {2007},
     url = {http://geodesic.mathdoc.fr/item/JCA_2007_14_2_JCA_2007_14_2_a8/}
}