P. Sotelo, M. Orr, M. T. Galante, M. K. Hossain, F. Firouzan, C. Longo, A. Kormanyos, H. Sarker, C. Janaky, M. N. Huda, K. Rajeshwar, and R. T. Macaluso. Role of f Electrons in the Optical and Photoelectrochemical Behavior of Ca(La_1−xCe_x)₂S₄ (0 ≤ x ≤ 1), Inorganic Chemistry 7, 4553–4560 (2019)