Sun , GengGan , SiqingLiu , Hongyu and Shang , Zaijiu. (2022). Symmetric-Adjoint and Symplectic-Adjoint Runge-Kutta Methods and Their Applications.
Numerical Mathematics: Theory, Methods and Applications. 15 (2).
304-335.
doi:10.4208/nmtma.OA-2021-0097