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Pommaret, J.F., Epstein, M. & de León, M. Comments and authors' reply on “The geometry of uniformity in second-grade elasticity” by M. de León and M. Epstein. Acta Mechanica 114, 231–233 (1996). https://doi.org/10.1007/BF01170407
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DOI: https://doi.org/10.1007/BF01170407