1. Albano P., Some properties of semiconcave functions with general modulus, J. Math. Anal. Appl.271 (2002), 217–231.
2. Albano P., Cannarsa P., Singularities of semiconcave functions in Banach spaces, in Stochastic Analysis, Control, Optimization and Applications, W.M. McEneaney, G.G. Yin, Q. Zhang (eds.), Birkhäuser, Boston, (1999), 171–190.
3. Albano P., Cannarsa P., Structural properties of singularities of semiconcave functions, Annali Scuola Norm. Sup. Pisa Sci. Fis. Mat.28 (1999), 719–740.
4. Alberti G., On the structure of singular sets of convex functions, Calc. Var. Partial Differential Equations2 (1994), 17–27.
5. Alberti G., Ambrosio L., Cannarsa P., On the singularities of convex functions, Manuscripta Math.76 (1992), 421–435.