01052nam2-2200349---450-99000334270020331620091102114542.00-444-85292-1000334270USA01000334270(ALEPH)000334270USA0100033427020091102d1979----km-y0itay50------baengNL||||||||001yyRings of differential operatorsJ. E. BjörkAmsterdam [etc.]North-Holland publishingcopyr. 1979XVII, 374 p.24 cmNorth-Holland mathematical library210010003342632001North-Holland mathematical library21Operatori differenziali515.7242BJÖRK,J. E.606601ITsalbcISBD990003342700203316510 NHM (21)6414/CBS51000111452BKSCIRSIAV79020091102USA011145Rings of differential operators1124788UNISA