00286nam a2200121Ia 45000030006000000080041000060400015000471000026000622450038000882600009001265460012001350050017001470STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aBarnenkov, G.; Others  aProblems in mathematical analysis  c1976  aEnglish20220125165958.0