Kusinski , Jan, and Łukasz Cieniek. “Calcium Doping in Rock-Salt Transition Metal Oxides: Defect Structure, Microstructural Evolution, and Transport Properties in FeO, CoO, and NiO”. Archives of Metallurgy and Materials, vol. 71, no. 3, Sept. 2026, pp. 787-92, doi:10.24425/amm.2026.1968.