%0 Journal Article %T GRACE era variability in the Earth's oblateness: a comparison of estimates from six different sources %A Meyrath,, Thierry %A Rebischung,, Paul %A , van DamTonie %J Geophysical Journal International %V 208 %N 2 %@ 0956-540X %D 2017-02-01 %I The Royal Astronomical Society %~ DeepDyve