00380nam a2200121Ia 4500082002100000100004200021245004000063260004800103300002300151490004400174500000500218700003500223  a515.72bAp646.NS  aAppell, Jurgen and Zabrejko, Peter P.  aNonlinear superposition operatorsb  aCambridgebCambridge University Pressc1990  a311p. Index, Bibl.  aCambridge tracts in Mathematicsv v. 95  a  aZabrejko, Peter P. ; jt. auth.