(1)
A. Baran, M. Botko, A. Zorkovská, M. Kajňaková, J. Šebek, E. Šantavá, J.P. Peng, C.T. Lin, and A. Feher, Heat capacity studies of magnetic phase transition in sodium-rich NaxCoO2 (0.73 ≤ x ≤ 0.87), Low Temp. Phys. 35, (2009) [Fiz. Nizk. Temp. 35, 1030-1033, (2009)] DOI: https://doi.org/10.1063/1.3253404.