Optical Spectroscopic Observations of Blazars and γ-Ray Blazar Candidates in the Sloan Digital Sky Survey Data Release NineDOI: info:10.1088/0004-6256/148/4/66v. 14866
Massaro, Francesco, Masetti, N., D'Abrusco, Raffaele, Paggi, A., and Funk, S. 2014. "Optical Spectroscopic Observations of Blazars and γ-Ray Blazar Candidates in the Sloan Digital Sky Survey Data Release Nine." The Astronomical Journal, 148 66. https://doi.org/10.1088/0004-6256/148/4/66.