1. Adams R. Sobolev Spaces. New York: Ac Press; 1975.
2. Attouch R, Buttazzo G, Michaille G. Variational analysis in Sobolev and BV spaces. Philadelphia: SIAM; 2005.
3. Ball JM. 1989. A version of the fundamental theorem for Young measures. In: PDES and Continuum Models of Phase Transitions (nice, 1988). Lecture Notes in Phys, vol 344. pp 207–215.
4. Brézis H. 1973. Operateurs Maximaux Monotones et Semigroups de Contractions dans les Espaces de Hilbert, North-Holland, Amsterdam.
5. Donaldson T. Inhomogeneous Orlicz-Sobolev spaces and nonlinear parabolic initial-boundary value problems. J Differ Equ 1974;16:201–256.