Higgins, J. R. (1977). Completeness and basis properties of sets of special functions.
Chicago Edition CitationHiggins, J R. Completeness and Basis Properties of Sets of Special Functions. Cambridge University Press, Cambridge, 1977.
MLA Edition CitationHiggins, J R. Completeness and Basis Properties of Sets of Special Functions. 1977.
Warning: These citations may not always be 100% accurate.