1. Anderson, H., Lebech, B., Poulse, H.F.: The structural phase diagram and oxygen equilibrium partial pressure of Y B2Cu3O6+x studied by powder diffraction and gas volumetry. Phys. C 172, 31–42 (1990)
2. Ball, J.M.: A version of the fundamental theorem for Young measures. Partial differential equations and continuum models of phase transitions. M. Rascle, D. Serre, M. Slemrod (eds.), Lecture Notes in Physics 344, 207–215 (1989)
3. Ball, J.M., Kirchheim, B., Kristensen, J.: Regularity of quasiconvex envelopes. Calc. Var. Partial Differ. Equ. 11(4), 333–359 (2000)
4. Bartels, S.: Adaptive approximation of young measure solutions in scalar non-convex variational problems. SIAM J. Numer. Anal. 42 (5), 505–529 (2004)
5. Bartels, S.: Numerical analysis of some non-convex variational problems. PhD-Thesis. Christian–Albrechts–Universität zu Kiel, Kiel 2001, (Available online at http://e-diss.uni-kiel.de/diss_519/)