Related online material
My books
- Björk, J.-E., Rings of Differential Operators, North-Holland Mathematical Library, Volume 21, North-Holland Publishing Company, Amsterdam, 1979, ISBN 0-444-85292-1.
- Fells Ritt, J., Differential Algebra, Dover Publications, Inc., New York, 1966 (1950), Library of Congress Catalog Card Number: 66-23746.