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1.
The Deficiency Index Problem for Powers of Ordinary Differential Expressions

by Robert M. Kauffman | Anton Zettl | Thomas T. Read.

Series: Lecture Notes in Mathematics ; v.621Edition: 1977Material type: Computer file Computer file; Format: electronic Publication details: Heidelberg Springer Berlin 1977Online access: Click here to access online Availability: Items available for reference: Accessible Online (1). : Location(s): .

2.
Norm Inequalities for Derivatives and Differences

by Man K. Kwong, Anton Zettl.

Series: Lecture Notes in MathematicsEdition: 1992Material type: Computer file Computer file; Format: electronic Publication details: Springer Berlin Heidelberg 1992Online access: Click here to access online Availability: Items available for reference: Accessible Online (1). : Location(s): .