The additive quark model revisited: Hadron- and photon-induced cross sections P. Desgrolard, M. Giffon, E. Martynov and E. Predazzi Eur. Phys. J. C, 9 4 (1999) 623-631 Published online: 30 June 1999 DOI: 10.1007/s100530050513