A Strong Maximum Principle for Varifolds That are Stationary with Respect to Even Parametric Elliptic Functionals Bruce SolomonBrian White Indiana University Mathematics Journal 1989 text pdf 10.1512/iumj.1989.38.38032 10.1512/iumj.1989.38.38032 en Indiana Univ. Math. J. 38 (1989) 683 - 691 state-of-the-art mathematics http://iumj.org/access/