Source: cirosantilli/space-time-approach-to-quantum-electrodynamic-by-richard-feynman-1949
= Space-Time Approach to Quantum Electrodynamic by Richard Feynman (1949)
https://journals.aps.org/pr/abstract/10.1103/PhysRev.76.769
The first key paper to his approach to <quantum electrodynamics> apparently.
Published on <Physical Review> 76.769.