Gomonai, A. I., and A. N. Gomonai. “Three-Photon Resonance Ionization Spectroscopy of Excited Even-Parity States of the Samarium Atom”. Ukrainian Journal of Physics 63, no. 12 (December 9, 2018): 1050. Accessed March 28, 2024. https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018191.