Enveloping algebra-valued gauge transformations for non-abelian gauge groups on non-commutative spaces B. Jurcǒ, S. Schraml, P. Schupp and J. Wess Eur. Phys. J. C, 17 3 (2000) 521-526 Published online: 31 August 2000 DOI: 10.1007/s100520000487