Three spheres inequalities and unique continuation for a   three-dimensional Lam\'e system of elasticity with C^1 coefficients
  Assuming that the Lam\'{e} moduli $\mu$, $\lambda$ are $C^{\tiny{1}}$ and $n\geq2$, we prove quantitative estimates of a weak sense of strong unique continuation for thesolutions of the n-dimensional Lam\'{e} system of the form of three spheres inequalities. 
Hang Yu