[3] K. Shibutani, T. Miyatake, R. Ogawa, T. Fujikawa: Proc. of MRS Int. Meeting on Advanced Materials, Tokyo, 1988, vol. 6, pp 505.
[4] T. Kamiyama, H. Asano, K. Shibutani, R. Ogawa, Y. Endoh, F. Izumi, W. I. F. David, R. Ibberson and Y. Yamaguchi: Proc. of ISS'90, “High Resolution Neutron Powder Diffraction of Superconducting La2CuO4. ”