Lansbury, G., Stern, D., Aird, J., Alexander, D., Fuentes, C., Harrison, F., …Zhang, W. (2017). The NuSTAR Serendipitous Survey: The 40-month Catalog and the Properties of the Distant High-Energy X-ray Source Population. Astrophysical Journal, 836(1), Article 99. https://doi.org/10.3847/1538-4357/836/1/99