Physica · 1946 · 56 citations · 8 references
Natural SciencesMathematicsPhysicsDifferential EquationsTheoretical PhysicsIntegral EquationsPartial Differential EquationsDirac Delta Function
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Enrico Fermi · Reviews of Modern Physics · 1932 · 1.1K citations
Dirac's Equation and the Spin-Spin Interactions of Two Electrons
G. Breit · Physical Review · 1932 · 450 citations
The Principles of Quantum Mechanics