On the Regularity of Boundaries of Sets Minimizing Perimeter with a Volume Constraint E. GonzalezU. MassariI. Tamanini Indiana University Mathematics Journal 1983 text pdf 10.1512/iumj.1983.32.32003 10.1512/iumj.1983.32.32003 en Indiana Univ. Math. J. 32 (1983) 25 - 37 state-of-the-art mathematics http://iumj.org/access/