00413nam a2200133Ia 4500082002000000100004200020245006200062250002400124260003400148300002900182490002800211500000500239700003500244  a515.35bG463.EP  aGilbarg, David and Trudinger, Neil S.  aElliptic partial differential equations of second orderb  areprint of the 1998  aBerlinbSpringer-Verlagc2001  axiii, 517p. Bibl. Index.  aClassics in Mathematics  a  aTrudinger, Neil S. ; jt. auth.