Structure of the Three-dimensional Quantum Euclidean Space
  As an example of a noncommutative space we discuss the quantum 3-dimensional Euclidean space $R^3_q$ together with its symmetry structure in great detail. The algebraic structure and the representation theory are clarified and discrete spectra for the coordinates are found. The q-deformed Legendre functions play a special role. A completeness relation is derived for these functions. 
B.L. Cerchiai, J. Madore, S. Schraml, J. Wess