References

Blakely, R.J., 1995. Potential Theory in Gravity and Magnetic Applications, 1st ed., Cambridge University Press. doi:10.1017/CBO9780511549816

Dziewonski, A.M. & Anderson, D.L., 1981. Preliminary reference Earth model. Physics of the Earth and Planetary Interiors, 25, 297–356. doi:10.1016/0031-9201(81)90046-7