O. Crisan, and M. Liu, "Voltage Collapse Prediction Using an Improved Sensitivity Approach," Electric Power Systems Research, Vol. 28, 1994, pp. 181-190.

O. Crisan, and M. A. Mohtadi, "Efficient Identification of Binding Inequality Constraints in the Optimal Power Flow Newton Approach," IEE Proceedings-C, Generation, Transmission and Distribution, Vol. 139, No. 5, September 1992, pp. 365-370.

O. Crisan, Qin Yu, M. N. Ayub, and M Liu, "Reactance as a Function of Temperature and Frequency for HTS Bulk Samples," International Conference on Modern Aspects of Superconductivity (ICMAS-91), Proceedings, Paris, pp. 337-342, 7-8 October, 1991.