@article{ASNSP_1999_4_28_4_719_0,
     author = {Albano, Paolo and Cannarsa, Piermarco},
     title = {Structural properties of singularities of semiconcave functions},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {719--740},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 28},
     number = {4},
     year = {1999},
     mrnumber = {1760538},
     zbl = {0957.26002},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1999_4_28_4_719_0/}
}