Greenland
Morlighem, M. et al. 2017, updated 2018. IceBridge BedMachine Greenland, Version 3. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/2CIX82HUV88Y.
Antarctica
P. Fretwell, et al. 2013. Bedmap2: improved ice bed, surface and thickness datasets for Antarctica. doi:10.5194/tc-7-375-2013