1. Ancestral SARS-CoV-2-specific T cells cross-recognize the Omicron variant
2. Hyperquantization of Feynman Amplitudes Phys. Rev,1954
3. Feynman Amplitudes and Strong-Coupling Pion Theory, Phys. Rev;miyazawa,1955
4. George Tiktopoulos High-Energy Behavior of Feynman Amplitudes, Phys. Rev,1963
5. Quantum Electrodynamics;feynman,1962