L. Ambrosio, B. Kirchheim: Rectifiable Sets in Metric and Banach Spaces Submitted to Math. Annalen. () 1999 L. Ambrosio, B. Kirchheim: Currents in Metric Spaces Acta Mathematica N. 185, p. 1-80, 2000 L. Ambrosio, B. Kirchheim, M. Lecumberry, T. Rivière: On the rectifiability of defect measures arising in a micromagnetics model p. 29-60, 2002 B. Kirchheim, V. Magnani: A counterexample to metric differentiability Proc. Ed. Math. Soc. Vol. 46, p. 221-227, 2003 B. Kirchheim, F. Serra Cassano: Rectifiability and parametrization of intrinsic regular surfaces in the Heisenberg group Ann. Scuola Norm.Sup. Pisa Cl.Sci. (5) Vol. III, p. 871-896, 2004 L. Ambrosio, B. Kirchheim, A. Pratelli: Existence of optimal transport maps for crystalline norms Duke Math. J. Vol. 125, N. 2, p. 207-241, 2004 L. Ambrosio, G. De Philippis, B. Kirchheim: Regularity of optimal transport maps and partial differential inclusions Rend. Lincei - Mat. e Appl. () 2011 C. De Lellis, G. De Philippis, B. Kirchheim, R. Tione: Geometric measure theory and differential inclusions Annales de la Faculte' des Sciences de Toulouse 2019