This chapter is based in part on
Abramowitz and Stegun (1964, Chapter 13) by L.J. Slater. The author is
indebted to J. Wimp for several references.
The main references used in writing this chapter are Buchholz (1969),
Erdélyi et al. (1953a), Olver (1997b), Slater (1960), and
Temme (1996b). For additional
bibliographic reading see Andrews et al. (1999), Hochstadt (1971),
Luke (1969a, b),
Wang and Guo (1989), and Whittaker and Watson (1927).