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harvard.edu
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Barast, Gilles; Razakamanantsoa, Andry-Rico; Djeran-Maigre, Irini; Nicholson, Timothy; Williams, David (June 2017). "Swelling properties of natural and modified bentonites by rheological description". Applied Clay Science. 142: 60–68. Bibcode:2017ApCS..142...60B. doi:10.1016/j.clay.2016.01.008.