Rings of $\h$-deformed differential operators
  We describe the center of the ring $\Diff(n)$ of $\h$-deformed differential operators of type A. We establish an isomorphism between certain localizations of $\Diff(n)$ and the Weyl algebra $\text{W}_n$ extended by $n$ indeterminates. 
B. Herlemont and O. Ogievetsky
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