@article{GDZPPN002181118,
title = {An Addition Theorem for the Associated Legendre Functions.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {218},
year = {1965},
pages = {17-22},
zbl = {0131.07202},
url = {http://dml.mathdoc.fr/item/GDZPPN002181118}
}
Johnson, B.E. An Addition Theorem for the Associated Legendre Functions.. Journal für die reine und angewandte Mathematik, Tome 218 (1965) pp. 17-22. http://gdmltest.u-ga.fr/item/GDZPPN002181118/