R. RoyDepartment of Mathematics and Computer Science,
F. W. J. OlverInstitute for Physical Science and Technology and
Department of Mathematics,
University of Maryland,
College Park, Maryland.
The authors are grateful to Steven G. Krantz and Peter R. Turner
for advice on early drafts of this chapter.
The main references used in writing this chapter are Levinson and Redheffer (1970),
Hobson (1928), Wall (1948), and Whittaker and Watson (1927).
For additional bibliographic reading see Copson (1935) and