Chadwick, P., Lyons, K., McComb, T., Orford, K., Osborne, J., Rayner, S., …Turver, K. (1999). A Search for Very High Energy Gamma Rays from Active Galactic Nuclei Visible from the Southern Hemisphere. Astrophysical Journal, 521, 547-551. https://doi.org/10.1086/307597