Spectroscopic observations of the quiescent neutron star system 4U 2129+47 (=V1727 Cygni)DOI: info:10.1051/0004-6361:200809516v. 485EDP Sciences773–775
Bothwell, M. S., Torres, M. A. P., Garcia, M. R., and Charles, P. A. 2008. "Spectroscopic observations of the quiescent neutron star system 4U 2129+47 (=V1727 Cygni)." Astronomy and Astrophysics, 485 773–775. https://doi.org/10.1051/0004-6361:200809516.