1. Acerbi E., Fusco N.: Semicontinuity problems in the calculus of variations. Arch. Rational Mech. Anal. 86((2), 125–145 (1984)
2. Allcock D.: An isoperimetric inequality for the Heisenberg groups. Geom. Funct. Anal. 8(2), 219–233 (1998)
3. Almgren, Jr., F.J.: Almgren’s Big Regularity Paper: Q-Valued Functions Minimizing Dirichlet’S Integral and the Regularity of Area-Minimizing Rectifiable Currents up to Codimension 2. World Scientific Monograph Series in Mathematics, Vol. 1. World Scientific Publishing Co., Inc., River Edge, 2000. (With a preface by Jean E. Taylor and Vladimir Scheffer)
4. Alvarez Paiva, J.C., Thompson, A.C.: Volumes on normed and Finsler spaces. A sampler of Riemann–Finsler geometry, Vol. 50 of Math. Sci. Res. Inst. Publ., pp. 1–48. Cambridge Univ. Press, Cambridge, 2004
5. Ambrosio L.: Metric space valued functions of bounded variation. Ann. Scuola Norm. Sup. Pisa Cl. Sci. (4) 17(3), 439–478 (1990)