1. (X) Magnetic compasses carriage and performance standards, https://puc.overheid.nl/nsi/doc/PUC_2469_14/1/.
2. AC 43-215 - Standardized Procedures for Performing Aircraft Magnetic Compass Calibration Document Information, FAA 2017, https://www.faa.gov/regulations_policies/advisory_circulars/index.cfm/go/document.information/documentID/1031648.
3. Accuracy classes of measuring instruments, International Recommendation OIMLR34, edition 1979 (E), International Organization of Legal Metrology, https://www.oiml.org/en/files/pdf_r/r034-e79.pdf.
4. ADIS16405 Triaxial Inertial Sensor with Magnetometer, https://www.analog.com/media/en/technical-documentation/data-sheets/ADIS16405.pdf.
5. Alken P., Thébault E., Beggan C.D. et al., International Geomagnetic Reference Field: the thirteenth generation. Earth Planets Space 2021, 73, 49, DOI: 10.1186/s40623-020-01288-x.