Churazov, E., Khabibullin, I., Sunyaev, R., & Ponti, G. (2017). Not that long time ago in the nearest galaxy: 3D slice of molecular gas revealed by a 110 yr old flare of Sgr A*. Monthly Notices of the Royal Astronomical Society, 465(1), 45-53. doi:10.1093/mnras/stw2750.