1. R. A. Adams,Sobolev Spaces, Academic Press, New York (1975).
2. R. A. Adams -J. Fournier,Cone conditions and properties of Sobolev spaces, J. Math. Anal. Appl.,61 (1977), pp. 713–734.
3. G. R.Allen,An inequality involving product measures, Radical Banach Algebras and Automatic Continuity (Long Beach, Calif., 1981), pp. 277-279
4. Lecture Notes in Math.,975, Springer, Berlin-New York (1983).
5. T. Aubin,Nonlinear Analysis on Manifolds. Monge-Ampère Equations, Grundlehren der mathematischen Wissenschaften,252, Springer-Verlag, New York-Heidelberg-Berlin (1982).