@article {EventHorizonTelescope:2019dse,
	title = {First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole},
	journal = {Astrophys. J. Lett.},
	volume = {875},
	year = {2019},
	pages = {L1},
	doi = {10.3847/2041-8213/ab0ec7},
	author = {Akiyama, Kazunori and others}
}
