1. Event Horizon Telescope Collaboration, Akiyama, K., Alberdi, A., Alef, W., Asada, K., Azulay, R., Baczko, A.K., Ball, D., Baloković, M., and Barrett, J. (2019). First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole. ApJL, 875, L1.
2. Event Horizon Telescope Collaboration, Akiyama, K., Alberdi, A., Alef, W., Algaba, J.C., Anantua, R., Asada, K., Azulay, R., Bach, U., and Baczko, A.K. (2022). First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way. ApJL, 930, L12.
3. Doeleman, S., Blackburn, L., Dexter, J., Gomez, J.L., Johnson, M.D., Palumbo, D.C., Weintroub, J., Farah, J.R., Fish, V., and Loinard, L. (2019). Studying Black Holes on Horizon Scales with VLBI Ground Arrays. arXiv.
4. DiFX: A Software Correlator for Very Long Baseline Interferometry Using Multiprocessor Computing Environments;Deller;Publ. Astron. Soc. Pac.,2007
5. DiFX-2: A More Flexible, Efficient, Robust, and Powerful Software Correlator;Deller;Publ. Astron. Soc. Pac.,2011