"Correlation between Superconducting Carrier Density and Transition Temperature in NbB2+x "
H. Takagiwa, S. Kuroiwa, M. Yamazawa, J. Akimitsu, K. Ohishi, A. Koda, W. Higemoto and R. Kadono, J. Phys. Soc. Jpn. 74, 1386-1389 (2005). 引用先8