@article{lai:1990:ec,
    author = {Lai, Shan-Tao and Chiu, Ying-Nan},
     title = {Exact computation of the $3$-$j$ and $6$-$j$ symbols},
   journal = {Comput. Phys. Comm.},
  fjournal = {Computer Physics Communications. An International Journal and
              Program Library for Computational Physics and Physical
              Chemistry},
    volume = {61},
      year = {1990},
    number = {3},
     pages = {350–360},
      note = {A Fortran program is included.},
       doi = {10.1016/0010-4655(90)90049-7},
     zblno = {0875.65037}}