1. A schematic model of Baryons and Mesons;Gell-Mann;Phys. Lett.,1964
2. An SU(3) model for strong interaction symmetry and its breaking. Version 2;Zweig;Dev. Quark Theory Hadron.,1964
3. A possible model for new resonances exotics and hidden charm;Iwasaki;Progr. Theoret. Phys.,1975
4. Bound states of heavy Q2Q2 systems;Heller;Phys. Rev. D,1985
5. Observation of structure in the J/ψ pair mass spectrum;Aaij;Sci. Bull.,2020