“Spectra and Oscillator Strengths of $d$-$d$ and $d$-$p$ Transitions for Cobalt-Like $Cd^{21+}$ Ion”. Journal of Atomic and Molecular Sciences 2, no. 3 (February 1, 2011): 241–246. Accessed March 15, 2026. https://gsp.tricubic.dev/jams/article/view/14608.