onde plane
1972 / [Notes and Discussions] On the Expansion of a Plane Wave in Spherical Waves / E. Ley-Koo / American Journal of Physics 40 (1972) p. 1538 [doi]
2001 / [Questions and Answers] #79. Does plane wave not carry a spin? / R. I. Khrapko / American Journal of Physics 69 (2001) p. 405 [doi]