1. S. Li, L.E.H. McMills, and K.V. Ramanujachary, in: Studies of High Temperature Superconductors, ed. by A.V. Narlikar (Nova Sci. Publ., Commack, NY 1990) p. 143; M. Greenblatt, L.E.H. McMills, S. Li, K.V. Ramanujachary, M.H. Pan, and Z. Zhang, Inorg. Synth.
30, 201 (1995).
2. NATO ASI Series;A.W. Hewat,1994
3. S.S.P. Parkin, V.Y. Lee, A.I. Nazzal, R. Savoy, R. Beyers, and S.J. LaPlaca, Phys. Rev. Lett.
61, 750 (1988).
4. M.A. Subramanian, Mater. Res. Bull.
29, 119 (1994).
5. I.K. Gopalakrishnan, J.V. Yakhmi, and R.M. Iyer, Physica C 175, 183 (1991).