Pounds, K., Allan, D., Barber, C., Barstow, M., Bertram, D., Branduardi-Raymont, G., …Wonnacott, D. (1993). The ROSAT Wide Field Camera all-sky survey of extreme-ultraviolet sources. I - The Bright Source Catalogue. Monthly Notices of the Royal Astronomical Society, 260(1), https://doi.org/10.1093/mnras/260.1.77