00418nam a2200133Ia 4500082002000000100002000020245006000040260003400100300000500134490012800139500000500267700000500272856000700277  a515.35bH812.AL  aHormander, Lars  aThe analysis of linear partial differential operatorsb  aBerlinbSpringer-Verlagc1983  a  aDie Grundlehren der Mathematischen Wissenschaftenva series of comprehensive studies in Mathematics ; v.256, 257 , 274, 275  a  a  df