00284nam a2200121Ia 45000030006000000080041000060400015000471000024000622450038000862600009001245460012001330050017001450STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aSansone, G.; Others  aNon linear differential equations  c1964  aEnglish20220125165943.0