Montero, Pedro J. Stellar Astrophysics, MPI for Astrophysics, Max Planck Society;
Cordero-Carrión, Isabel Stellar Astrophysics, MPI for Astrophysics, Max Planck Society;
Montero, P. J., & Cordero-Carrión, I. (2012). BSSN equations in spherical coordinates without regularization: vacuum and nonvacuum spherically symmetric spacetimes. Physical Review D, 85(12): 124037, pp. 1-10. doi:10.1103/PhysRevD.85.124037.