单个文件在以下链接是可用的：

Individual files are available in the following links: Bessjy -- Bessel functions Jn and Yn for real argument and integer or real order. Bessik -- Modified Bessel function In and Kn for real argument and integer or real order. CBessjy -- Bessel functions Jv and Yv for real or complex arguments and real order. CBessik -- Modified Bessel functions Iv and Kv for complex arguments and real order. -Individual files are available in the following links: Bessjy- Bessel functions Jn and Yn for real argument and integer or real order. Bessik- Modified Bessel function In and Kn for real argument and integer or real order. CBessjy- Bessel functions Jv and Yv for real or complex arguments and real order. CBessik- Modified Bessel functions Iv and Kv for complex arguments and real order.

BESSEL.H
BESSIK.CPP
BESSJY.CPP
CBESSIK.CPP
CBESSJY.CPP
GAMMA.CPP