1. Bouman , J. 2007 http://earth.esa.int/pub/ESA_DOC/GOCE/GO-TN-HPF-GS-0193_1.0-FrameTransformation.pdf
2. GOCE gravitational gradients along the orbit;Bouman;J. Geodes.,2011
3. Bruinsma , S.L. et al. 2010 GOCE gravity field recovery by means of the direct numerical method Proc. ESA Living Planet Symposium
4. ESA 1999 Gravity field and steady-state ocean circulation mission