@article{watson:1999:aas,
    author = {Watson, James K. G.},
     title = {Asymptotic approximations for certain $6$-$j$ and
              $9$-$j$ symbols},
   journal = {J. Phys. A},
  fjournal = {Journal of Physics. A. Mathematical and General},
    volume = {32},
      year = {1999},
    number = {39},
     pages = {6901–6902},
      issn = {0305-4470},
     coden = {JPHAC5},
   mrclass = {33C80 (81R05)},
  mrnumber = {MR1721786 (2000i:33025b)},
       doi = {10.1088/0305-4470/32/39/401},
     zblno = {0964.33007}}