Observables in topological Yang-Mills theorieswith extended shift supersymmetry Clisthenis P. Constantinidis, Olivier Piguet and Wesley Spalenza Eur. Phys. J. C, 45 1 (2006) 227-240 Published online: 15 January 2006 DOI: 10.1140/epjc/s2005-02382-x