Symmetry of ground states of semilinear eliptic equations with mixed Sobolev growth Hengui Zou Indiana University Mathematics Journal 1996 text pdf 10.1512/iumj.1996.45.986 10.1512/iumj.1996.45.986 en Indiana Univ. Math. J. 45 (1996) 221 - 240 state-of-the-art mathematics http://iumj.org/access/