@article{braithwaite:1973:alp,
    author = {Braithwaite, W. J.},
     title = {Associated {L}egendre polynomials, ordinary and modified
              spherical harmonics},
   journal = {Comput. Phys. Comm.},
  fjournal = {Computer Physics Communications},
    volume = {5},
      year = {1973},
    number = {5},
     pages = {390–394},
      note = {Single-precision Fortran, maximum accuracy 16S},
       doi = {10.1016/0010-4655(73)90065-9},
     links = {\URL[Code]{http://cpc.cs.qub.ac.uk/summaries/ABME}}}