W. Hehl and Yakov Itin, « The Cauchy Relations in LinearElasticity Theory », Journal of Elasticity, vol. 66, 2002, p. 185-192 (DOI 10.1023/A:1021225230036)
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State College, 1950 avec Robin John Knops : Uniqueness theorems in linearelasticity (= Springer tracts in natural philosophy, Volume 19). Springer, Berlin
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