Pulsoni, C., Gerhard, O., Arnaboldi, M., Coccato, L., Longobardi, A., Napolitano, N., …Tortora, C. (2018). The extended Planetary Nebula Spectrograph (ePN.S) early-type galaxy survey: The kinematic diversity of stellar halos and the relation between halo transition scale and stellar mass. Astronomy and Astrophysics, 618, Article A94. https://doi.org/10.1051/0004-6361/201732473