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Mathur, BL and Parthasarathy, K and Khincha, HP and Ramesh, N (1976) Active current and potential transducers. In: Proceedings of the Institution of Electrical Engineers, 123 (12). pp. 1355-1356.
Mathur, BL and Mehrotra, VK and Parthasarathy, K and Kothari, GC (1975) Developments in solid-state under-frequency relays. In: Proceedings of the Institution of Electrical Engineers, 122 (11). pp. 1306-1307.