00339nam a2200121Ia 4500082002000000100002100020245007300041260003400114300002000148490003900168500000500207700000500212  a515.35bB581.LT  aBibikov, Yuri N.  aLocal theory of nonlinear analytic ordinary differential equationsb  aBerlinbSpringer-Verlagc1979  aix, 146p. Index  aLecture notes in Mathematicsv 702  a  a