Citation: Tyutyunnik, A. P.; Zubkov, V. G.; Kellerman, D. G.; Pereliaev, V. A.; Kar Kin, A. E.; Svensson, G. (1996). Synthesis, superconducting properties and structural (including electron diffraction) studies of NaxNbO2 and LixNbO2. European Journal of Solid State and Inorganic Chemistry, 33, pp. 53-65.