1. Higher Transcendental Functions, Vol. 1, Bateman Manuscript Project;Erdélyi,1953
2. Expansions in series of Legendre functions;Love;Proc. London Math. Soc.,1992
3. Abel summability of certain series of Legendre functions;Love;Proc. London Math. Soc.,1994
4. E.C. Titchmarsh, Theory of Functions, Oxford, 1932, p. 233.