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Valasek, J. Piezo-electric and allied phenomena in Rochelle salt. Phys. Rev. 17, 475–481 (1921)
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Wu, M. 100 years of ferroelectricity. Nat Rev Phys 3, 726 (2021). https://doi.org/10.1038/s42254-021-00383-6
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DOI: https://doi.org/10.1038/s42254-021-00383-6
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