00334nam a2200121Ia 4500082002000000100002300020245007600043260003400119300001000153490003900163500000500202700000500207  a515.35bP644.EB  aPimbley, George H.  aEigen function branches of nonlinear operators and their bifurcationsb  aBerlinbSpringer-Verlagc1969  a128p.  aLecture notes in Mathematicsv 104  a  a