Titchmarsh, E. C. (1962). Eigenfunction expansions associated with second-order differential equations (2d ed.). Clarendon Press.
Chicago Edition CitationTitchmarsh, E. C. Eigenfunction Expansions Associated with Second-order Differential Equations. 2d ed. Oxford: Clarendon Press, 1962.
Deismireacht MLATitchmarsh, E. C. Eigenfunction Expansions Associated with Second-order Differential Equations. 2d ed. Clarendon Press, 1962.
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