The 10830 Å Helium Line Among Evolved Stars in the Globular Cluster M4DOI: info:10.1088/0004-637X/808/2/124v. 808124
Strader, Jay, Dupree, A. K., and Smith, Graeme H. 2015. "The 10830 Å Helium Line Among Evolved Stars in the Globular Cluster M4." The Astrophysical Journal, 808 124. https://doi.org/10.1088/0004-637X/808/2/124.