Erwin, Peter Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;
Erwin, P., & Debattista, V. P. (2017). The frequency and stellar-mass dependence of boxy/peanut-shaped bulges in barred galaxies. Monthly Notices of the Royal Astronomical Society, 468(2), 2058-2080. doi:10.1093/mnras/stx620.