@article{CTT100621206, author = {K. Ishida and Y Tokunaga and Y. Kitaoka and K. Asayama and M. Azuma and Z. Hiroi and M. Takano}, title = {Antiferromagnetic Nuclear Resonance of Cu in Infinite-Layer Compounds, SrCuO2 and Ca0.9Sr0.1CuO2 -Comparison between Hyperfine Coupling Constant in a CuO2 Plane and in a Spin-Ladder System-}, journal = {J. Phys. Soc. Jpn.}, year = 1996, } @article{CTT100621213, author = {K. Ishida and Y. Kitaoka and Y. Tokunaga and S Matsumoto and K. Asayama and M. Azuma and Z. Hiroi and M. Takano}, title = {Spin Correlation and Spin Gap in Quasi-One-Dimensional Spin-1/2 Cuprate Oxides: A 63Cu NMR Study}, journal = {Phys. Rev. B}, year = 1996, } @article{CTT100621199, author = {Kenji Ishida and Yoshio Kitaoka and K Asayama and M. Azuma and Z. Hiroi and M. Takano}, title = {Spin Gap Behavior in Ladder-Type of Quasi-One-Dimensional Spin (S=1/2) System SrCu2O3}, journal = {J. Phys. Soc. Jpn.}, year = 1994, }