00745nam0-22002651i-450-99000046996040332120080711101233.0000046996FED01000046996(Aleph)000046996FED0100004699620020821d1966----km-y0itay50------baenga-------001yySecond-order partial differential equationsM. M. SmirnovGroningen, NeherlandsNoordhoff1966Equazioni differenziali, parziali517.383Smirnov,Modest MichajlovicITUNINARICAUNIMARCBK99000046996040332110 P.T. 102687 C.C.E.DINELDINELUNINA