Ishida, K., Kitaoka, Y., Kawasaki, Y., Tabuchi, K., Kashima, K., Asayama, K., Geibel, C., & Steglich, F. (1999). Evolution from Magnetically Ordered to Unconventional Superconducting Phase in a Series of CexCu2Si2 Compounds: Cu-NQR Study. JJAP Series, 11, 35-37.