Initial Measurements of Black Hole Spin in GX 339-4 from Suzaku Spectroscopyv. 679IOP PublishingL113–L116
Miller, J. M., Reynolds, C. S., Fabian, A. C., Cackett, E. M., Miniutti, G., Raymond, J., Steeghs, D., Reis, R., and Homan, J. 2008. "Initial Measurements of Black Hole Spin in GX 339-4 from Suzaku Spectroscopy." The Astrophysical Journal Letters, 679 L113–L116.