@article{lai:1992:ec,
    author = {Lai, Shan-Tao and Chiu, Ying-Nan},
     title = {Exact computation of the $9$-$j$ symbols},
   journal = {Comput. Phys. Comm.},
  fjournal = {Computer Physics Communications. An International Journal and
              Program Library for Computational Physics and Physical
              Chemistry},
    volume = {70},
      year = {1992},
    number = {3},
     pages = {544–556},
      note = {Double-precision Fortran},
      issn = {0010-4655},
     coden = {CPHCBZ},
   mrclass = {81R05 (22E70 81-04)},
  mrnumber = {MR1171526 (93d:81061)},
       doi = {10.1016/0010-4655(92)90115-F},
     links = {\URL[Code]{http://cpc.cs.qub.ac.uk/summaries/ACHW}}}