[en] The quarks is defined as a flavour vector state in the C colour space and the antiquark as a vector in the C* dual space. The observables become scalar in the colour-space built even with a vector and a covector (meson) or with a vector and a pseudo-vector (baryon). The pseudo-vector is responsible of the Pauli principle existence and allows a comprehension of the distinction between baryons and mesons. The investigation of the strong interaction as the exchange of gluons leads to a crossing rule in contradiction with the JOZI rule in the general case. The existence and allowed decay of different sort of baryium is then considered