%0 Journal Article %K High temperature superconductors %K Superconducting materials %K Oxide superconductors %K Microscopic Examination–Transmission Electron Microscopy %K X-ray Analysis %K Magnetic Measurements %K Bismuth Calcium Strontium Copper Oxides %K Polytypoid %K Superconductor Connectivity Problem %A Ramamoorthy Ramesh %A G Thomas %A Y Mej %A H.L Luo %B IEEE Transactions on Magnetics %D 1989 %G eng %P 2360-2363 %R 10.1109/20.92782 %T Bi-Ca-Sr-Cu-O superconductors: The connectivity issue %V 25