Question regarding GSL

[Vitor de Oliveira]

Dear Sir or Madam,

I have a question regarding GSL.

For the numerical integration of ordinary differential equations, it is
possible to choose the explicit embedded Runge-Kutta Prince-Dormand (8, 9)
method. However, I only found the (7, 8) version in the literature (Prince,
Peter J., and John R. Dormand. "High order embedded Runge-Kutta formulae."
Journal of computational and applied mathematics 7.1 (1981): 67-75.).

Do you have the reference for the (8, 9) method or is this a typo in the
code?

Thank you in advance,

Vitor