Titehmarsh, E. (1970). Eigenfunction expansions associated with second order differential equations. Clarendon.
Citación estilo ChicagoTitehmarsh, E.C. Eigenfunction Expansions Associated with Second Order Differential Equations. Oxford: Clarendon, 1970.
Cita MLATitehmarsh, E.C. Eigenfunction Expansions Associated with Second Order Differential Equations. Clarendon, 1970.
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