Estimates in L^p for magnetic Schrodinger operators Zhongwei Shen Indiana University Mathematics Journal 1996 text pdf 10.1512/iumj.1996.45.1268 10.1512/iumj.1996.45.1268 en Indiana Univ. Math. J. 45 (1996) 817 - 842 state-of-the-art mathematics http://iumj.org/access/