00377nam a2200133Ia 4500008004100000040001700041041001200058082002000070100001900090245006600109250001200175260003900187300001700226230917s9999||||xx |||||||||||||| ||und||  e210142aMAIN  aEnglish  a515.35 V951D(2)  aVrabie, Ioan I 0aDifferential equations : An introduction to basic concepts, r  a2nd ed.  aNew JerseybWorld Scientificc2011  axix, 460p p.