IERS - Int. Earth Rotation and Reference Systems Service | GGOS
We've pumped so much groundwater that we've nudged the Earth's spin - AGU Newsroom
Movements in the Earth's interior are the missing link of polar motion: GFZ
Polar Motion - Three Views - YouTube
NASA SVS | Earth Orientation Animations
POLAR MOTION
Analysis of Earth's polar motion and length of day trends in comparison with estimates using second degree stokes coefficients from satellite gravimetry - ScienceDirect
18. Polar motion – 100 Proofs that the Earth is a Globe