1. The hidden-charm pentaquark and tetraquark states
2. L.B. Okun, High-Energy Physics. Proceedings, 11th International Conference, ICHEP’62, Geneva, Switzerland, Jul 4–11, 1962, pp. 845–866.
3. A schematic model of baryons and mesons
4. Developments in the Quark Theory of Hadrons, vol. 1;Zweig,1964
5. An SU(3) Model for Strong Interaction Symmetry and Its Breaking. Version 1;Zweig,1964