Sedky, A., Amna Salah, and S. A. Amin. 2017. “Excess Conductivity and Critical Physical Parameters of Y Substituted Ca Site of Bi: 2223 High Tc Superconductors”. Asian Journal of Physical and Chemical Sciences 3 (2), 1-15. https://doi.org/10.9734/AJOPACS/2017/36244.