1. Rogowski, W and Steinhaus, W (1912); Die messung der magnetische spannung, Arch Electrotech I. pp. 141–150
2. Ray, W F and Davis, R M (1991): British Patent Application No 91184283
3. Ward. D A (1979); British Patent No GB 2041875B
4. Murgatroyd. P N et al (1991); Making Rogowski coils. Meas Sci Technol. 2. pp. 1218–1219