@article{Raynal:1979:ODP,
author = {Raynal, Jacques},
title = {On the definition and properties of generalized $6$-$j$\
symbols},
journal = {J. Math. Phys.},
fjournal = {Journal of Mathematical Physics},
volume = {20},
year = {1979},
number = {12},
pages = {2398–2415},
issn = {0022-2488},
coden = {JMAPAQ},
mrclass = {33A75 (22E70 81C40)},
mrnumber = {MR0553502 (81b:33022)},
mrreviewer = {S. Saran},
doi = {10.1063/1.524047},
zblno = {0449.33019}}