Electrical & Computer Engineering - 1981 Steigerwald, R. L., & Hopkins, D. C. (1981). Characteristic Input Harmonics of DC-DC Converters and their Effect on Input Filter Design. IEEE Transactions on Industrial Electronics and Control Instrumentation, IECI-28(2), 73–82. https://doi.org/10.1109/tieci.1981.351029 Lubkeman, D. L., & El-abiad, A. A. (1981). Overview Of Automation Of Power Distribution Systems. Conference Proceedings Southeastcon '81., 260–264. https://doi.org/10.1109/secon.1981.673443 Nagle, H., & Nelson, V. (1981). Digital Filter Implementation on 16-Bit Microcomputers. IEEE Micro, 1(1), 23–41. https://doi.org/10.1109/mm.1981.290818