00295nam a2200121Ia 45000030006000000080041000060400015000471000021000622450036000832600025001195460012001440050017001560STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aPontryagin, I.S.  aOrdinary differential equations  bAddison Wesleyc1962  aEnglish20220125165942.0