Zhang, S., Hailey, C. J., Mori, K., Clavel, M., Terrier, R., Ponti, G., Goldwurm, A., Bauer, F. E., Boggs, S. E., Christensen, F. E., Craig, W. W., Harrison, F. A., Hong, J., Nynka, M., Soldi, S., Stern, D., Tomsick, J. A., & Zhang, W. W. (2015). Hard X-ray morphological and spectral studies of the galactic center molecular cloud Sgr B2: constraining past Sgr A(star) flaring activity. The Astrophysical Journal, 815(2):, pp. 1-16. doi:10.1088/0004-637X/815/2/132.