Society, National Geographic (2012-08-27). "island". National Geographic Society. Archived from the original on 2021-06-17. Retrieved 2020-12-07.
nih.gov
ncbi.nlm.nih.gov
Takaya, Yutaro 2018. The tremendous potential of deep-sea mud as a source of rare-earth elements. Nature. 8 (1): 5763. [1] doi:10.1038/s41598-018-23948-5. PMC 5893572. PMID 29636486.
web.archive.org
Society, National Geographic (2012-08-27). "island". National Geographic Society. Archived from the original on 2021-06-17. Retrieved 2020-12-07.