@incollection{Gouesbet12,
author = {A. Draux and G. Gouesbet},
title = {Generalized Orthogonality Relation for Spherical Harmonics},
booktitle = {Electromagnetic Radiation},
publisher = {IntechOpen},
address = {Rijeka},
year = {2012},
editor = {Saad Osman Bashir},
chapter = {1},
doi = {10.5772/34486},
url = {https://doi.org/10.5772/34486}
}