q-Deformed Minkowski Space based on a q-Lorentz Algebra
  The Hilbert space representations of a non-commutative q-deformed Minkowski space, its momenta and its Lorentz boosts are constructed. The spectrum of the diagonalizable space elements shows a lattice-like structure with accumulation points on the light-cone. 
B. L. Cerchiai, J. Wess