This chapter is based in part on
Abramowitz and Stegun (1964, Chapter 23) by E. V. Haynsworth and K. Goldberg.
The main references used in writing this chapter are
Erdélyi et al. (1953a, Chapter 1), Nörlund (1924, Chapter 2), and
Nörlund (1922). Introductions to the subject are contained in
Dence and Dence (1999) and Rademacher (1973); see also Apostol (2008).
bibliography on the topics of this chapter can be found in
Dilcher et al. (1991).