Ferrándiz, J. M., Modiri, S., Belda, S., Barkin, M., Bloßfeld, M., Heinkelmann, R., Schuh, H. (2020): Drift of the Earth’s Principal Axes of Inertia from GRACE and Satellite Laser Ranging Data. - Remote Sensing, 12, 2, 314.https://doi.org/10.3390/rs12020314