1. HTS-110 in New Zealand; www.hts-110.com.
2. LEM, www.lem.com, IT 200-S UltraStab; see marketing document for discussion of fluxgate technology.
3. DaniSense www.danisense.com, DC2001F; see quick link to Flux-Gate for description of the physics.
4. Design and operation of a 40-MW, highly stabilized power supply
5. Darrah Electric, sells LEM products, Milwaukee WI, USA. www.darrahelectric.com.