1. G. Anzellotti,Pairings between measures and bounded functions and compensated compactness, Ann. Mat. Pura e Appl.,135 (1983), pp. 293–318.
2. G. Anzellotti -M. Giaquinta,Funzioni BV e tracce, Rend. Sem. Mat. Univ. Padova,60 (1978), pp. 1–21.
3. E. Barozzi -E. Gonzalez -I. Tamanini,The mean curvature of a set of finite perimeter, Proc. Amer. Math. Soc.,99 (1987), pp. 1–4.
4. E. Barozzi -U. Massari,Regularity of minimal boundaries with obstacles, Rend. Sem. Mat. Univ. Padova,66 (1982), pp. 129–135.
5. E. Barozzi -I. Tamanini,On the convergence of minimal boundaries with obstacles, Rend. Sem. Mat. Univ. Padova,74 (1985), pp. 75–84.