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H. C. Appelo, M. Groenenboom, B. V. Hazemeyer, and J. Lisser, “The Zero-Flux DC Current Transformer, A High Precision, Bipolar, Wide-Band Measuring Device”, in Proc. 7th Particle Accelerator Conf. (PAC'77), Chicago, IL, USA, Mar. 1977, pp. 1810-1812. |
