The Quantum Symplectic Cayley-Klein Groups
  The contraction method applied to the construction of the nonsemisimple quantum symplectic Cayley-Klein groups $ Fun(Sp_q(n;j)) $. This groups has been realised as Hopf algebra of the noncommutative functions over the algebra with nilpotent generators. The dual quantum algebras $ sp_q(n;j) $ are constructed. 
N.A. Gromov, I.V. Kostyakov and V.V. Kuratov