1. Non-singular formulation of the gravity vector and gravity gradient tensor in spherical harmonic;Balmino G.;Manuscript Geodaetica,1990
2. Spherical harmonic analyses of the geomagnetic field for eight epochs between 1600 and 1910;Barraclough D. R.;Geophysical Journal of the Royal Astronomical Society,1974
3. An efficient algorithm for computing the Earth's gravitational potential and its derivatives at satellite altitudes;Belikov M. V.;Mamuscripta Geodaetica,1992
4. Spherical harmonic analysis and synthesis with the use of column-wise recurrence relations;Belikov M. V.;Mamuscripta Geodaetica,1991
5. Sensitivity of selected geomagnetic properties to truncation level of spherical harmonic expansions;Benton E. R.;Geophysical Research Letters,1982