Baran, A., Botko, M., Zorkovská, A., Kajňaková, M., Šebek, J., Šantavá, E., Peng, J., Lin, C., & Feher, A. (2009). Heat capacity studies of magnetic phase transition in sodium-rich NaxCoO2 (0.73 ≤ x ≤ 0.87). ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР, 35(10), 1030–1033. https://doi.org/10.1063/1.3253404