Higgins J R Completeness and basis properties of sets of special fucntions - Cambridge Cambridge university press 1977 - x,134p. cm. - Cambridge Tracts in Mathematics; 72 . Appndix (1-2) (p. Standard No.: 42893 Source: Textual Subjects--Topical Terms: Special functionsMathematics Dewey Class. No.: B39, L7-;1