@article{Carlson:1971:NPA,
author = {Carlson, B. C.},
title = {New proof of the addition theorem for {G}egenbauer
polynomials},
journal = {SIAM J. Math. Anal.},
fjournal = {SIAM Journal on Mathematical Analysis},
volume = {2},
year = {1971},
pages = {347–351},
issn = {1095-7154},
mrclass = {33.27},
mrnumber = {MR0289823 (44 \#7010)},
mrreviewer = {Mary L. Boas},
doi = {10.1137/0502032},
zblno = {0199.38802}}