Martin, W.
, Kaufman, V.
and Musgrove, A.
(1993),
A Compilation of Energy Levels and Wave-lengths for the Spectrum of Singly-Ionized Oxygen (O II), J. Phys. & Chem. Ref. Data (JPCRD), National Institute of Standards and Technology, Gaithersburg, MD
(Accessed October 3, 2024)