"gley". Oxford English Dictionary (Online ed.). Oxford University Press. Retrieved 2022-12-27. (Subscription or participating institution membership required.) https://www.oed.com/search/dictionary/?q=gley
Trolard, Fabienne; Bourrié, Guilhem; Abdelmoula, Mustapha; Refait, Philippe; Feder, Frédéric (June 2007). "Fougerite, a new mineral of the pyroaurite-iowaite group: Description and crystal structure". Clays and Clay Minerals. 55 (3): 323–334. Bibcode:2007CCM....55..323T. doi:10.1346/CCMN.2007.0550308. /wiki/Bibcode_(identifier)
Génin, Jean-Marie R.; Aïssa, Rabha; Géhin, Antoine; Abdelmoula, Mustapha; Benali, Omar; Ernstsen, Vibeke; Ona-Nguema, Georges; Upadhyay, Chandan; Ruby, Christian (May 2005). "Fougerite and FeII–III hydroxycarbonate green rust; ordering, deprotonation and/or cation substitution; structure of hydrotalcite-like compounds and mythic ferrosic hydroxide". Solid State Sciences. 7 (5): 545–572. doi:10.1016/j.solidstatesciences.2005.02.001. /wiki/Doi_(identifier)
IUSS Working Group WRB (2022). "World Reference Base for Soil Resources, fourth edition" (PDF). International Union of Soil Sciences, Vienna. Archived (PDF) from the original on 2023-08-11. Retrieved 2023-08-16. https://wrb.isric.org/files/WRB_fourth_edition_2022-12-18.pdf