Regularity of volume-minimizing graphs David JohnsonPenelope Smith Indiana University Mathematics Journal 1995 text pdf 10.1512/iumj.1995.44.1978 10.1512/iumj.1995.44.1978 en Indiana Univ. Math. J. 44 (1995) 45 - 86 state-of-the-art mathematics http://iumj.org/access/