@article{roothaan:1997:cjs,
    author = {Roothaan, Clemens C. J. and Lai, Shan-Tao},
     title = {Calculation of $3n$-$j$ symbols by {L}abarthe's method},
   journal = {International Journal of Quantum Chemistry},
      year = {1997},
    volume = {63},
     pages = {57–64},
    number = {1},
       doi = {10.1002/(SICI)1097-461X(1997)63:1<57::AID-QUA10>3.0.CO;2-3}}