The Megamaser Cosmology Project. I. Very Long Baseline Interferometric Observations of UGC 3789DOI: info:10.1088/0004-637X/695/1/287v. 695287–291
Reid, Mark J., Braatz, J. A., Condon, J. J., Greenhill, L. J., Henkel, C., and Lo, K. Y. 2009. "The Megamaser Cosmology Project. I. Very Long Baseline Interferometric Observations of UGC 3789." The Astrophysical Journal, 695 287–291. https://doi.org/10.1088/0004-637X/695/1/287.