Machacek, M. E., Jones, C., Kraft, R. P., Forman, W. R., Roediger, E., Sheardown, A., Wan, J. T., "A Chandra Study of the NGC 7618/UGC 12491 Major Group Merger at Apogee: Multiple Cold Fronts, Boxy Wings, Filaments, and Arc-shaped Slingshot Tails", Astrophysical Journal, 2023