Jordanian twist quantization of D=4 Lorentz and Poincaré algebras and D=3 contraction limit A. Borowiec, J. Lukierski and V.N. Tolstoy Eur. Phys. J. C, 48 2 (2006) 633-639 Published online: 24 October 2006 DOI: 10.1140/epjc/s10052-006-0024-6