distribution de Dirac
2003 / Derivatives of the Dirac delta function by explicit construction of sequences / Timothy B. Boykin / American Journal of Physics 71 (2003) p. 462 [doi]
2006 / [Notes and Discussions] Playing Quantum Physics Jeopardy with zero-energy eigenstates / L. P. Gilbert ; M. Belloni ; M. A. Doncheski ; R. W. Robinett / American Journal of Physics 74 (2006) p. 1035 [doi]