@article{1309753,
  author = {T. Johannsen and D. Psaltis and S. Gillessen and D. P. Marrone and F. {\"O}zel and S. S. Doeleman and V. L. Fish},
  title = {Masses of nearby Supermassive Black Holes with Very Long Baseline Interferometry},
  year = {2012},
  journal = {ApJ},
  volume = {758},
  pages = {30},
  language = {eng},
}