Non-commutative standard model: model building M. Chaichian, P. Presnajder, M. M. Sheikh-Jabbari and A. Tureanu Eur. Phys. J. C, 29 3 (2003) 413-432 Published online: 18 June 2003 DOI: 10.1140/epjc/s2003-01204-7