Gupta, Manoj Kumar, et al. “Study of CK Enhancement Factors for Oxygen Induced L Subshell X-Rays in Lanthanum Series (58 ≤ Z ≤ 70)”. Asian Journal of Chemistry, vol. 21, no. 10, May 2026, pp. S284-286, https://asianpubs.org/index.php/ajchem/article/view/35968.