00330nam a2200109Ia 4500082002000000100004700020245005100067260003600118300002600154500000500180700003500185  a515.35bP967.MP  aProtter, Murray H. and Weinberger, Hans F.  aMaximum principles in differential equationsb  aNew YorkbSpringer-Verlagc1984  ax, 261p. Index, Bibl.  a  aWeinberger, Hans F.; jt. auth.