Eigen function expansions associated with second order diffeerential equations. 2 pts /

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• Eigen function expansions associated with second order diffeerential equations. 2 pts /
  gan: Titchmarsh, E. C.
  Cyhoeddwyd: (1958)
• Eigenfunction expansions associated with second-order differential equations.
  gan: Titchmarsh, E. C.
  Cyhoeddwyd: (1962)
• Eigenfunction expansions associated with second-order differential equations
  gan: Titchmarsh, E. C
• Eigenfunction expansions: Associated with second-order differential equations, Part2
  gan: Titchmarsh, E C
  Cyhoeddwyd: (1958)
• Eigenfunction expansions: Associated with second-order differential equations, Part1
  gan: Titchmarsh, E C
  Cyhoeddwyd: (1962)