Pontzen, A., Read, J. I., Teyssier, R., Governato, F., Gualandris, A., Roth, N., & Devriendt, J. (2015). Milking the spherical cow - on aspherical dynamics in spherical coordinates. Monthly Notices of the Royal Astronomical Society, 451(2), 1366–1379. https://doi.org/10.1093/mnras/stv1032