The Megamaser Cosmology Project. II. The Angular-diameter Distance to UGC 3789DOI: info:10.1088/0004-637X/718/2/657v. 718657–665
Braatz, J. A., Reid, Mark J., Humphreys, E. M. L., Henkel, C., Condon, J. J., and Lo, K. Y. 2010. "The Megamaser Cosmology Project. II. The Angular-diameter Distance to UGC 3789." The Astrophysical Journal, 718 657–665. https://doi.org/10.1088/0004-637X/718/2/657.