M. Groenenboom

Accurate measurement of d.c. and a.c. by transformer

M. Groenenboom, J. Lisser, 1977 .

The Zero-Flux DC Current Transformer a High Precision Bipolar Wide-Band Measuring Device

M. Groenenboom, J. Lisser, H. C. Appelo, 1977, IEEE Transactions on Nuclear Science.