01079nam a2200289 i 450099100113006970753620020507183818.0950825s1981 us ||| | eng 0126568804b10805059-39ule_instLE01307516ExLDip.to Matematicaeng515.353AMS 35GQA377.S68Sperb, René P.344495Maximum principles and their applications /René P. SperbNew York :Academic Press,1981ix, 224 p. ;23 cmMathematics in science and engineering.A series of monographs and textbooks,0076-5392 ;157General higher-order equations and systems.b1080505923-02-1728-06-02991001130069707536LE013 35G SPE11 (1981)12013000034027le013-E0.00-l- 00000.i1090957628-06-02Maximum principles and their applications348107UNISALENTOle01301-01-95ma -engus 01