00869nam0-22002891i-450-99000122962040332120131209125055.0000122962FED01000122962(Aleph)000122962FED0100012296220001205d1967----km-y0itay50------baengSome Improperly Posed Problems of Mathematical Physicsby M.M. Lavrentiev[S.l.]Springer-Verlag1967Springer tracts in natural philosophyvolume 11.̜Lavrentiev,Mikhail Mikhailovich350453ITUNINARICAUNIMARCBK990001229620403321FI.MAT.D.773DARCO15-L-119818MA1MA1DARCOSome Improperly Posed Problems of Mathematical Physics382058UNINA